OMC 985074 0985074 5.0L 5.7L V8 Crankshaft Harmonic Balancer Damper GM 6272221 Exhaust Manifold but the main stud was

but the main stud was actually used all the way until the 2000's and you should be able to swap most of these components to the ones from the early 70's

Mercury 768-7435A3 Piston Assembly Superseded / Equivalent / Related P/N: 768-5035A2 > 768-5219A2 > 768-6664A3 > 768-7435A3 > 768-7433A3 > 768-8896A3 > 768-9137A12

3L 4cyl 120hp Model Number 232BMRMEF

Manufacturer Part Number: Outboard Motor Corporation 0173112 / 173112

The long one is only found on MerCruiser V8 (898 / 198hp / 200hp) Models with 2-Barrel Rochester Carburetors

OMC 985074 0985074 5.0L 5.7L V8 Crankshaft Harmonic Balancer Damper GM 6272221 Exhaust Manifold but the main stud wasPart Number(s) Included OMC 985074 0985074 Crankshaft Harmonic Balancer Damper Assembly Same as GM 6272221 General Application Compatibility 1981 1989 OMC Chevy V8 5. 0L 305 & 5. 7L Applications Other Details Freshwater Used Parts Cleaned & Repainted Purchase with confidence! 1981 1982 1983 1984 1985 1986 1987 1988 1989