I am going to build a 400sbc. I just posted about the cylinder head question. Anyway, I am running a Crane Mechanical Roller .580/600" lift cam and it hits the connecting rods. My question is are there specific cylinders that the rods need to be ground down or is it all of them. Next, how would I go about doing this. Am I just going to grind away some of the rod bolt until it doesn't hit anymore or is there a tried and true method to clearance the rods from hiting the cam on a 400. I know this is a common problem on 400's, but I haven't found specific instructions about how to do this. I may just have a shop assemble the motor and have them do it, I would just really like to know how to do this though.