Hi there.
I have a 350 marin block with 4 bolt mainīs.
Is that okey too build a high performence engine around :confused: .Is there a difference betvine car and boat blocks?

i dont think there is any difference between those 2

and a 350ci 4 bolt is an excellent block to work with

some say a 4 bolt is better then a 2 bolt, but other ppl say a 2 bolt has more "meat" so its stronger.