GM 378450 MerCruiser 938-7482 Cylinder Head V8 305 5.0L Early 228 1977-1979
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- MerCruiser 938-6536 > 938-7482
- GM Part Number 378450
- Generally the best practice is to just match your existing casting numbers.
Found on MerCruiser / OMC GM Chevy V8 305cid 5.0L 4BBL Models > 228hp & 230hp with 4BBL Intake Models 1977-1979 at the latest as this is an early version of the 378450 (there was a later version with larger valves)
- Used with the standard 2-piece Rear Main Seal engines.
- Perimeter Bolt Valve Covers
- NON-VORTEC Head (This shouldn't need to even be mentioned here)
- 12-Bolt Intake
- Appears to have the 1.720" intake valves
- Overall good condition, May need to be gone through before installation.
- Cleaned & Inspected for cracks
- Freshwater used parts
- You get the head as pictured
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1977 1978 1979 1980 1981 1982 1983 1984 1985 1986