ball and cup pushrods

Good point fishy! I just assumed it was flat tappet since he posted hyd.small block. And I never realized the base circle of a roller cam would be that much different than a flat tappet cam. I've never ran a roller cam.

I was just looking into it so it was fresh in my mind. And it's not the base circle that's different. It's that roller lifters are a bunch taller