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Standard
L4 153" 90 HP
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Standard
L6 230" 140 HP
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L22
- L6 250"
155 HP
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Standard
V8 307" 200 HP
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L65
- V8 350" 250 HP
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LM1
- V8 350" 255 HP
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L30
- V8 327" 275 HP
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L48
- V8 ** 350" 295 HP
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L79
- V8 327" 325 HP
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LT1
- V8 350" 320 HP
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L34
- V8 396" 350 HP
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L78
- V8 396" 375 HP
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L78
- V8 396" 375 HP
Alum Heads
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Transmission
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RPO
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68
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69
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70
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68
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69
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70
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68
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69
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70
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68
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69
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70
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69
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70
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69
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68
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68
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69
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70
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70
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68
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70
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68
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69
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70
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68
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69
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70
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AC
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AC
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AC
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AC
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AC
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AC
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AC
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AC
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Torque-drive transmission
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MB1
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?
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AB
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CCB
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AN
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AQ
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CCD
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X
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BB
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BC
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X
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Heavy duty 3-speed manual transmission
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MC1
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OC
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BC
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BB
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X
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HP
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KA
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KC
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3-speed Floor shift transmission control
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M11
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Heavy duty 3-speed manual transmission
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M13
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X
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X
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X
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3-speed manual transmission
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M15
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OA
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AA
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CCA
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BA
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BD
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AM
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AP
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CCC
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CM
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CN
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BE
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BF
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CAA
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CCG
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DA
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DA
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CNC
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HC
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CGA
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CNI
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EA
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MS/EP
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EP
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3-speed manual transmission Police/Taxi
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CCL
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4-speed manual transmission
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M20
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CRF?
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DB
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DE
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CND
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X
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X
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HQ
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EA
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MS/EP
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HA
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CGK
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CNJ
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EP
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CTB
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MX
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JF
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CTX
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MQ
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JH
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CKO
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CKT
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4-speed manual transmission HD Clutch
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KA
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KC
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4-speed manual transmission - close ratio
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M21
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CRG
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X
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MX
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X
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CTZ
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MQ
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X
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CKQ
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CKU
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4-speed manual transmission - heavy duty
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M22
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X
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X
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Powerglide transmission
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M35
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OH
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AB
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??
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BF
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BH
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AN
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AQ
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X
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CQ
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CR
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BB
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BC
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CAB
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X
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DE
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DC
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CCC
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CNE
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HF
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X
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CNM
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HR
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EE
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MU
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HE
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X
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CNK
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Powerglide transmission Police and Taxi
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CCM
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3-speed automatic transmission - TH350*
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M38
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AO
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AR
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X*
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BD
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BH
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X*
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DD
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CNF
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HD
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CGC
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CNN
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HS
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HB
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X*
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CRE
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TH350 Police and Taxi
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CCK
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3-speed automatic transmission - TH400*
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M40
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CTC
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MR
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JI
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CTW
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MR
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JL
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CTY
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CKP
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Information taken from original GM sources, many of which
conflicted each other. Use this only as a guide.
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Not Available this year.
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* Turbo Hydramatic was ordered as M40 but the TH350 was installed
on small bock cars and TH 400 was installed on Big Block cars
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** L48 was 295 HP originally and 300 HP later
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Not Available on this engine.
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Available on this engine. Letters = Engine Suffix
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This cross member was used on the
small block V8 cars.
This cross member was used on the big block V8 cars equipped with a 4 speed
transmission.
Here is a picture of the TH400 see how different it looks from the 4 speed
version.
Shown below is the Turbo Hydramatic 400 cross member (top) next to the 4
speed manual cross member (bottom).
