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but some of the 454 mag models stock setups from the factory were peanut-port cylinder heads paired with this aluminum square-port intake manifold
Should work on multiple years please ask if unsure
225-S (4 BBL
Part #'s Included Steering Handle: 379166
MerCruiser 59755 42 Amp 1-Wire Alternator 1100894 Delco Remy 10SI Oil Pans but some of the 454Part Number(s) Included Manufacturer AC Delco Stamped Part Number 1100894 42A (Other Common Stamping is 1100915 42A) Rated Amperage 42A Self Exciting Internal Regulator Negative Ground One Wire Connection 2 Inch Mounting Foot Equivalent Part Numbers MerCruiser 56045 59755 69729 OMC 0983836 983836 (I'm pretty sure on this, as there was a one off thing for 1984 just make sure your alternator is a 1 wire without additional wires coming out of the back of