NastyZ28.com - the most comprehensive numbers decoding site on the net   Camaro Super Sport Engines - the 396

The 396 was the largest production option engine factory installed in the Second Gen Camaro. They all actually displaced 402 cubic inches due to a .030 overbore but were advertised as 396's. The LS6 454 was scheduled as an option but GM management scratched it at the last minute. The 396 would last from 1970 until 1972, after this year, the Super Sport option, along with the big block would become just a memory. Any Camaro with a factory installed 396 would be a Super Sport. In otherwords, the only way to obtain the 396 was to check the Z27 option box, along with the big block option.

1970 L78 396
1970 L78 396
1972 LS3 396
1972 LS3 396

1970 SS396 - L78 375hp (gross) "King of the Hill"
Casting # GM P/NDescription
Block3969854 4 bolt main, suffix codes: CJH, CJL, CKO, CTY
Crankshaft severalForged steel
Heads 3964291 109 cc, 2.19/1.88 valves, dome symbol
Cam 3904366 3904362 symbol: OMO Solid lifter - 0.520 lift, 316(I)/302(E) duration
Pistons Domed type - yields 11.0:1 compression
Intake 3963569Aluminum, holley
Carb (A/T) 3969898GMHolley List 4492, 780cfm , 4150 series - 4BBL
Carb (A/T) 3969894GPHolley List 4556, 780cfm , 4150 series - 4BBL w/NB2 (Calif)
Carb (M/T) 3967477GGHolley List 4557, 780cfm , 4150 series - 4BBL
Carb (M/T) 3967479GMHolley List 4491, 780cfm , 4150 series - 4BBL w/NB2 (Calif)
LH Exhaust 3909879 2.526", Rear Outlet, AIR
RH Exhaust 3916178 2.526", Rear Outlet, AIR
Distributor 1112000 single point w/RFI
Alternator: Delcotron 37 Amp, part # 1100837
Water Pump: 3931065, or 3969811 (late 70)
Pulleys:
water pump - 3976060 AP
crankshaft - 3955291 AB
power steering - 3941105 DD
air pump - 3932458

Note: This is the only 4 bolt main 396 used in the Camaro.

1970 SS396 - L34 350hp (gross)
Casting # GM P/NDescription
Block3969854 2 bolt main, suffix codes: CJH, CJI, CTW, CTX
Crankshaft variousForged steel
Heads 3964290 100 cc, 2.06/1.72 valves
Cam 3904364 3904359 symbol: OM, hydraulic - 0.461(I)/0.480(E) lift, 350I/352E duration
Pistons Flat w/valve relief - yields 10.25:1 compression
Intake 3955287Iron, Quadrajet
Carb (A/T) 7040204Federal Emissions, 4MV Quadrajet
Carb (A/T) 7040504w/CA Emissions
Carb (M/T) 7040205Federal Emissions
Carb (M/T) 7040505w/CA Emissions
LH Exhaust 3909879 2.526", Rear Outlet, AIR
RH Exhaust 3916178 2.526", Rear Outlet, AIR
Distributor 1112000 single point w/vacuum
Alternator: Delcotron 37 Amp, part # 1100837
Water Pump: 3931065, or 3969811 (late 70)

1971 SS396 - LS3 300hp (net)
Casting # GM P/NDescription
Block3969854 2 bolt main, suffix codes: CLA, CLB, CLC, CLD
Crankshaft variousForged steel
Heads 3993820 113 cc, 2.06/1.72 valves
Cam 3863545 3963544 symbol: M, hydraulic - 0.398(I)/0.430(E) lift, 316I/334E duration
Pistons Flat w/valve relief - yields 8.5:1 compression
Intake 3955287
Carb (A/T) 70412004MV Quadrajet
Carb (M/T) 7041201
LH Exhaust 3989343 2.526", Rear Outlet, AIR
RH Exhaust 3989310 2.526", Rear Outlet, AIR
Distributor 1112057 RFI, single point w/vacuum
Alternator: Delcotron 37 Amp, part # 1102454
Water Pump: 3969811

CLC & CLD suffix codes are unverified

1972 SS396 - LS3 270hp (net)
Casting # GM P/NDescription
Block3999290 2 bolt main, suffix codes: CLA, CLB, CTA, CTB
Crankshaft variousForged steel
Heads 3999241 113 cc, 2.06/1.72 valves
Cam 3863545 3963544 symbol: M, hydraulic - 0.398(I)/0.430(E) lift, 316I/334E duration
Pistons Flat w/valve relief - yields 8.5:1 compression
Intake 6263753
Carb (A/T) 70422204MV Quadrajet
Carb (M/T) 7042215
LH Exhaust 3989343 2.526", Rear Outlet, AIR
RH Exhaust 3989310 2.526", Rear Outlet, AIR
Distributor 1112057 RFI, single point w/vacuum
Alternator: Delcotron 37 Amp, part # 1102454
Water Pump: 6263707

CTx suffix codes are listed w/ AIR. Block 3999290 was used in late 72.

General notes: Alternators unverified. AIR was installed in all cars. It was manditory for California delivered cars, but was typically quickly removed if delivery was to any of the other 49 states. So the exhaust will be equipped for AIR, but often times will be plugged.


Last updated: 10/20/2011
Author: MadMike Maciolek

NastyZ28.com - the most comprehensive numbers decoding site on the net
Return to Main Decoding Page

1997 - 2013 NastyZ28.com (tm)
North Georgia Classic Camaro
All rights reserved