Hi guys, I am thinking of replacing my built 454 (400hp) with a new gen VI 502/502, Boat is a 79 cigarette 20, motor is a new GM crate motor, full roller with alum heads. Just wondering what kind of problems I am looking forward to. Any help would be greatly appreciated. Thanks.

Is the "crate" engine designed for automotive use? If so, you will need to install inconel exaust valves and a cam with a wider lobe separation angle (114 or so)

yes it is set up for automobile use and thankyou.

Search for the threads on 572 crate motors, just about every thing should apply the same

thanks

check Eagle Engine Sales--hi-perf marine gen xI 502/502--just got mine running

Thanks, greatly appreciated.