I'm trying to decide how to proceed with this engine. It came with the boat and broke it last weekend.
Mark IV block .060" over with a nasty crack in cylinder 5
2 piece rear main 4.250 crank ( unknown brand and type )
6.135 trick flow rods with 7/16 arp bolts
One cracked piston
Edelbrock oval ports 110cc chamber and 290cc intakes
Roller cam and rockers ( unknown brand and specs )
I was excited at first when I discovered the crank and considering I may need to buy a block, my first thought was to do a 540 and top it with good heads. I soon realized I have a set of short rods which I realize is not ideal.
I'd like to get some suggestions on what direction to go with this deal. Ive done some digging and pistons aren't readily available to match this combo. I'd like to get the most bang for my buck here but I don't have enough experience with different combos to know what will stand up. This is for a 22 foot tunnel with an outdrive. Rpm not much over 5000.
Thanks for any insight