Holley Swap Pan Issue

I swapped my non vvt milodon stuff for the holley stuff (I wanted the drop in windage tray and o-ring gasket) . Found out the hard way after pulling the milodon (again) without unbolting anything but the pan , that the holley wouldn't fit back in without raising the engine and lowering the hdk k-frame. I would guess it would be tighter with a stock k. Then found out the pan doesn't seat with studded mains. The rear bolt boss casting hits the stud nuts and required grinding the inside of the pan. 408 swinger called it on the vvt pick up tube. Just make sure you have the correct pump too since that's what the tube bolts to.