Roller Lifter Options for 59 deg R1 Block

Krooser said

Kind of wondering about the accuracy of the machining. I have heard stories about how Petty Enterprises actually cut out the lifter valleys in their Cup motors and repositioned them to 1) get rid of the 59 degree lifter angle and 2) get them all in line and on the same angle.

I would imagine the shops that have the tooling to bush the lifters would be able to get them all in line and installed properly.

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This will not set well with some...but I have seen machine work performed on blocks by a CNC operated by a fairly well known place here in Ca. that was pure $hit! Just because it's on a CNC doesn't mean squat. You have to choose someone who knows how to machine what you want done. Having said that, if done properly, yes the lifters will be where the factory blueprints say they should be. You'll need to supply the lifters you plan on using so they can be measured to fit the bushings being installed. Less leak, possibly better or more accurate cam timing due to proper lifter placement, which can help the lifters (both flat tappet and roller) live longer.