I have a 350 block. 4 bolt mains that is .30 over high dome pistons with x casting rods. turned crank motor has new cam bearings and freeze plus with only 5 hours of run time on them. I have alot of money in this thing. the motor will need line boring done to it. minor fix. third main cap makes the crank real snug with tight. like to get $300.00 240-298-6705 california maryland local pick up only