1970 - 73 Z28s For Sale
1974 and Later Z28s For Sale
1970 Z28 Engine - LT1 360hp (gross)
| Casting # | GM P/N | Description | Block | 3970010 | 4 bolt main, suffix codes: CTB, CTC | Crankshaft | 330550 | Forged steel | Heads | 3927186 | 63.995 cc, 2.02/1.6 valves, screw in studs & guide plates | Cam | 3972182 | 3972178 | symbol: (1) square Solid lifter - 0.458(I)/0.484(E) lift, 317I/346E duration | Pistons | Domed type - yields 11.0:1 compression | Intake | 3972110 | Carb (A/T) | 3972120 | Holley List 4490, 780cfm , 4150 series - 4BBL | Carb (A/T) | 3972122 | Holley List 4554, 780cfm , 4150 series - 4BBL w/NB2 (Calif) | Carb (M/T) | 3972121 | Holley List 4555, 780cfm , 4150 series - 4BBL | Carb (M/T) | 3972123 | Holley List 4489, 780cfm , 4150 series - 4BBL w/NB2 (Calif) | LH Exhaust | 3942527 | 2.026", Rear Outlet, AIR | RH Exhaust | 3946826 | 1.96", Rear Outlet, AIR | Distributor | 1112019 | single point w/RFI |
Water Pump: 3953692
crank pulley: 9956668 coded CG
Deep Groove Water Pump Pulley: 3995647 coded AP
Power steering Pulley: last four #'s 1105
Note: Rods: LT1 "pink" rods. 5.7", 6th design, forged steel, shot peened, magnafluxed, heat treated,
high RPM rod bolts and expensive.
Intake 3972116 listed as service replacement manifold.
1971 Z28 Engine - LT1 330hp (gross, 275hp NET)
| Casting # | GM P/N | Description | Block | 3970010 | 4 bolt main, suffix codes: CGP, CGR | Crankshaft | 330550 | Forged steel | Heads | 3973487 | 75.47 cc, 2.02/1.6 valves, screw in studs & guide plates | Cam | 3972182 | 3972178 | symbol: (1) square Solid lifter - 0.458(I)/0.484(E) lift, 317I/346E duration | Pistons | Flat w/valve relief - yields 9.0:1 compression | Intake | 3959594 | Carb (A/T) | 3989022 | Holley List 4800, 780cfm , 4150 series - 4BBL | Carb (M/T) | 3989021 | Holley List 4801, 780cfm , 4150 series - 4BBL | LH Exhaust | 3989041 | Rear exit, log type w/AIR, 2.026 outlet | RH Exhaust | 3986330 | Rear exit, log type w/AIR, 1.96 outlet | Distributor | 1112049 | Manual Trans, RFI, single point w/vacuum | Distributor | 1112074 | Auto Trans, RFI, single point w/vacuum |
Water Pump: 3957170
Cylinder head has swirl polished valves and chrome valve stems.
Alternate cylinder head was 3986316 (unverified).
1972 Z28 Engine - LT1 255hp (net)
| Casting # | GM P/N | Description | Block | 3970010 | 4 bolt main, suffix codes: CKS, CKT | Crankshaft | 330550 | Forged steel | Heads | 3998916 | 76.18 cc, 2.02/1.6 valves, screw in studs & guide plates | Cam | 3972182 | 3972178 | symbol: (1) square Solid lifter - 0.458(I)/0.484(E) lift, 317I/346E duration | Pistons | Flat w/valve relief - yields 9.0:1 compression | Intake | 3959594 | Carb (A/T) | 3997788 GB | Holley List 6238, 780cfm , 4150 series - 4BBL | Carb (M/T) | 3999263 GA | Holley List 6239, 780cfm , 4150 series - 4BBL | LH Exhaust | 3989041 | Rear exit, log type w/AIR, 2.026 outlet | RH Exhaust | 3986330 | Rear exit, log type w/AIR, 1.96 outlet | Distributor | 1112095 | Manual Trans, RFI, single point w/vacuum | Distributor | 1112049 | Auto Trans, RFI, single point w/vacuum | Distributor | 1112153 | 2nd design - M/T, single point w/vacuum & ECC | Distributor | 1112156 | 2nd design - A/T, single point w/vacuum & ECC |
Water Pump: 6263701
unverified but alternate head casting #'s include: 3973487, 3973487X, & 3998993
