Heads for 454 trouble

[tankmfd]

Bought a remanufactured block and heads 4 years ago. Dropped an intake valve a week ago. Head gasket was leaking and heads were rusted out and unusable as per machine shop. I was told block and heads were from a freshwater block but I doubt it four years and heads were clogged with rust. What size heads. Can't seem to find same casting number. Motor is gen 4 if I want 350 up out of it

 

[bcclew]

getting new heads what about the rest of the block?

 

[makomark]

Standard production Mark IV engines had the "peanut port" heads....using anything else larger won't do much good in a typical marine application.

I believe they normally used 119cc open chamber heads....depending on the pistons used, you'll want the same volume to maintain the correct CR. The existing heads can be measured...the first casting number i found in my cheat sheet is 14081045..

 

[makomark]

Standard production Mark IV engines had the "peanut port" heads....using anything else larger won't do much good in a typical marine application.

I believe they normally used 119cc open chamber heads....depending on the pistons used, you'll want the same volume to maintain the correct CR. The existing heads can be measured...the first casting number i found in my cheat sheet is 14081045..