Wet mag crank, grind if not cracked to low side of tolerance, check big end on rods, resize if necessary, grind out oil return holes in the back of block as large as you can get them. usually 70% larger than stock. ck oil return holes on heads for head gasket or block obstruction where they meet the block, grind out if necessary. install BRASS stand pipes in the center holes of the block one inch long, this will allow any crank case pressure a place to escape without fighting oil thats returning down the ground out end ones. assemble with .0025 rod and .003 main clearances,use 10/30 oil with your H.V. pump. go race it. Bill