I would think that you could purchase a performance intake and heads now for less money than all of that machining work.

Much less and better. Just saying if you keep the mpi manifold the mods are well worth the work

Hot Boat was my favorite performance boating magazine.

I sure do miss it.

I learned a lot from reading it.

Damn whered the article go!

I know that this is a SUPER OLD thread, but any chance someone has the articles still?

I may still have the old magazines. I followed this back then and built a motor based on it. The guys name was Gary Knox If my memory serves me correctly, Speedstar Marine in AZ. If I can't find the article I do have all the specs. if that's what you are looking for. 502 MPI + 0.30, aluminum heads, 1.8 rockers, I think the lift was 648 on the Ultradyne cam, intake work and so on. Let me know if I can help.

Wanted to read through the article. I might be looking to upgrade next winter and wanted to see what was out there for the MPI. If you can't find it..specs are all I need.

With the factory manifold I dont think theres is alot of room for improvement. Best move would be decent cam, A decent set of heads, and convert it to a EFI manifold like this Pro-Flo

https://www.offshoreonly.com/article...om-stock-power
We've come up with a pretty good formula to balance cost vs power

Is this the son Johnny I met in Bimini last year? at the gas dock filling up buddies 32 Fountain that was one of the pace boats for the day

Im in the middle of putting LS engines in my Donzi, maybe I should do something with the heads/cam on the 502MPI engines I pulled out and throw on the engine dyno. What kind of air/fuel and timing do you guys usually run on those things, Im sure alot lazier than we do on our street/drag race stuff