I'm missing something. Extra ( $$$$) machine work to fit in a roller? Some or all blocks require clearanceing for the lifters. I'm not to up on what lifters need what or how much of anything.
You had mentioned that you have a pre-magnum roller block that had been poorly machined and not properly clearanced. Therefore, the machine work required for this block would be less than the cost of retrofit lifters, which would be needed on a older LA block that did not need any machine work. Does that make sense? :sign6:
I was pretty tired last night, worked on the truck till midnight. I apologize if I wasn't being clear.