the AH 426 HC on this engine should indicate a 1965 race hemi with high compression like from a 1965 A990 originally.
I think only when in pairs
Dads boat had 400s and when they went bad we replaced each building up with parts (cheaper) both had timing chains but one cam had lobes ground in reverse so both were re-ground. The gear on cam-oil pump drive were backward. Cranks rods and pistons were the same but backward crank had the oil serrations opposite (we re-used the cranks, steel) as said above Both distributors turned same direction (oil pump HAS to turn normal direction) one starter turned backward (direct drive type) we installed fresh water system, salt ate the other cast iron up.
And possibly a V drive??
Ours didn’t have those? Trying to remember what year the boat was 34’ Concord. He bought it it in 78 or 79 used.
