jeepracer wrote:Im looking for information on 377 sbc's. ive searched the web all over and cant find any info on these motors. eventually i want to build this and i was wondering what kind of horsepower they are capable of with world sportsman 2 heads. they seem to be a good race head but i cant find any info on a 377 with them
What info are you looking for? there's no mystery, it's just another SBC. You will need to use bearing spacers or special bearings to fit the crank. It's a good combo if you're limited to 377 inches or so.
The Sportsman II is a very old head. They can make some power in the right hands, but an Dart iron eagle platinum, RHS iron, EQ Iron, or a GMPP Bowtie Vortec are way ahead. Any of those are the better choice for iron head classes.
Old used 400 blocks are fragile. Anything over 600HP drag race or 500 HP endurance is really asking for trouble.