Thanks beater. I figured some stuff would swap. It seems the 292 isn't mentioned a lot of times when it says it will work for a 250.
CNC, I'm new to the forum so I didn't know exactly how to search specifically. But i'll keep looking. I've been working with Ed Curtis of Flow Tech Induction, he says he can get a roller core for the 292; it will be billet. So I know we need a 292 specific core especially due to the fuel pump eccentric lobe. I've seen mechanical roller lifters for a 250 with the link bar between (Crower and Isky both make one); that gives me a center to center reference but like I said it's for a 250. Thus the question if it would changeover to a 292. I think I heard on here that an Olds V8 hydraulic roller lifter would work for center to center but I don't know about the height. That was a good point CNC.