GM Chevy Small block V8
GM CRANKSHAFTS
GM Performance Parts crankshafts listed in this section are the backbone of a high-performance engine build and are the same components that go into GMPP crate engines. 14088526
Crankshaft, Cast Iron (not shown)
• Nodular cast iron with 3.48" stroke and 2.10" diameter rod journals
• One-piece rear main seal crankshaft for 300- and 330- horsepower engines This crank does not have a pilot bearing.
A. 14096036
Crankshaft, Forged Steel
• Forged 1053 steel with 3.48" stroke and 2.10" diameter rod journals
• Standard 350 mains for 350 HO engines with one-piece rear seal and 3.00" flywheel flange bolt circle
• Used on ZZZ, ZZ2 and ZZ3 engines Requires counterweighted flywheel. 12556307
Crankshaft, Forged Steel (Used in Late-style ZZ4 Engine) (not shown)
• Forged 1053 steel crankshaft used in post -November 1998 ZZ4 engines
• Replaces all cast or steel ZZ4 crankshafts Must be used with connecting rod P/N 10108688 and piston P/N 10159436. 12489436
Crankshaft, 383-cubic-inch Forged Steel (not shown)
• Forged 4340 steel crankshaft used to create 383-cubic-inch engines with 3.800" stroke
• Rod journals are 2.10"
• Mains are standard 350 size Should be used with connecting rods
P/N 19169670, bearing kit P/N 17800761, standard pistons P/N 88962748 or 0.030" oversize pistons P/N 88962749, balancer P/N 12498008, and 1986-and-later one-piece crank seal design flywheel or flexplate. B. 10185100
Crankshaft Forging (350-cubic-inch Style)
• Raw forging from S38 micro alloy steel
• Can be machined for a 3.46" to 3.50" stroke
24502460
Crankshaft Forging (not shown)
• Exceptionally strong and durable 4340 steel raw forging
• Ideal for machining to custom stroke dimensions from 3.20" to 4.00"
• 2.900" diameter main bearing journals can be ground to fit 400-cubic-inch small-block main bearings
• Large front section can be machined for big-block or small-block balancer
• Uses early style two-piece rear seal C. 10051118
Rear Crankshaft Seal Adapter
• Allows installation of early - style, two-piece seal crankshaft in block machined for one-piece rear seal
• Allows installation of heavy-duty crankshaft in cast iron Bowtie small-block V-8 or 90 V-6
• Kit includes two-piece aluminum seal retainer mounting bolts and hardware. (Gasket and seal not included.)
Use rear seal P/N 10121044, retainer gasket P/N 12555714, dowel pin P/N 9441003, and 1986 or later oil pan and gasket set. | 
