A ford cleveland this is required...lifter bushings. it is the ONLY way to correct the oiling issue that this platform has. I have them made at 1.187 OD so I can correct the horrible geometry that the blocks are as cast...its amazing the engine even runs let alone makes any kind of serious power or rpm without it. my cams are ground accordingly and still use the fords .875 dia. lifter
and the lifter bushing work corresponds with the correct rocker stud location, inserts are installed to get the geometry "spot on"... 7/16 bottom thread relocated to the "right" position, 1/2 top thread comp cams stud made by arp 1/2" trunions installed in the 1.73 rockers at the "correct" pivot length for optimum geometry in this application. (the pictures show what was done but the "math" involved will stay in my brain for now, I may share that info at a later date) The Geometry that I refer to is on both sides of the stud, not only were the rocker tip contacts the valve, as that is only part of the "package"
