Does anyone know if there are any differences between a 4.3 liter chevy marine block and the standard 4.3liter chevy truck block? I bought a bare 4.3 liter block (had been in an astro van) to replace a cracked block in my boat. The boat engine had very few hours so i had planned on using the crank, rods and roller cam from the old boat engine.
Ther is no difference between the blocks but there is in the intake and the crank and the cam and the exshast manifolds the block is the same though.. I got the same engine in my boat and I replaced it...
85 chevy s10 4x4
2.8l v6 4bl
538,862 miles and counting
From what i have seen the blocks are the same - but the marine heads are way better then most the 4.3 offerings
I have a set of marine heads for my toyota that out flow the ported stockers i have- alotta work just to get the stockers to flow what little air they did - then the marine ones blew them away unported!