I just cracked a 454 out of a 89 force 235. Mechanical fuel pump. Two piece seal. How far back does this block go. It cannot be sleeved. Cracked almost to head bolts. Also, any ideas why it cracked? Piston in pieces, rod bent. I know water, but, from exhaust or head? 21 years old but well maintained. No salt water. Boat does (did) sixty empty. Any ideas for more efficiency and or power with realiability. I want to stay normaly asperiated. Also, four bolt vs. two bolt mains. Any help would be appreciated. First time rebuild for me. Can't believe this, broke in august!

Get yourself a Dart sportsman block.They have a special till the end of September.$250.00 rebate.

steve, call me, i am a machine shop in tacoma wa. area. have plenty of replacement blocks available. can do just a machined block, short block or long block or even a core for you. 253-377-6399