2 bolt block
well I'll chime in here our second "spare engine" for our funny car is a 2 bolt block it is filled and has a mucho high dollar crank in it ive very carefully massaged it to fit what i think is right and we also run titaniumn rods in it as well it makes in excess of 1100 hp and ive check the rods and main bearings and they look like they are new! just take your time in the assembly and use good parts especially the crank and rods o yea its also studded at the main caps and use a good oil pump. a good balance job with a line bore goes along way mike