I purchased a set of MP cast iron heads #576 or 578 too many years ago to remember what the scoop was on them. They came w/ a 2.02 intake, pocket ported intake runner and fully ported exhaust runner. Getting ready to assemble, and I discovered that the rocker arm pedestals are taller than stock and that they were drilled and tapped for 3/8 hold down bolts. I think that these heads were cast with W-2 specs??? Does anyone know what are the dimensions for cutting down the pedestals? Are they to be cut for W-2 pedestals? Need to know what to say to the machine shop or am I missing something? Thanks