As I recall, the rod bolts (2.200 H-beam) cleared the cylinder bores, but I ground clearance there anyway while I was preparing the block. I did have to just touch the oil pickup boss on the block, picture attached. I run a 1/2 NPT Moroso internal pickup. I had the Callies 4.250" crank counterweights turned down to 7.14" dia before balancing, 2185 gram bobweight.