Strange, I asked about sleeving the lifter bores when I had the machine work done on my 440/505, at the supossedly best machine shop around Tulsa, they told me they couldn`t do it !
I would do it. It helps with oil control and corrects geometry of the lifter to the cam, Also helps with the pressure on the lifter bearing especially on the up.
We used to send out blocks to have the oversize lifter bores sleeved... Then we would machine the lifter bore back to size and redrill the oil passage for the lifters so it wouldn't be blocked by the sleeve.... It saved us from scrapping otherwise good blocks...
