Roller cam / pushrods?

This is exactly what I said it is in my first post. It's a late model LA 360 with factory roller lifters, AKA "roller block" These have the roller retainer cage in the valley, and block oil holes to the deck / heads.

I'm sure I'll have to fiddle with PR length, my main concern is that they don't use a different lower ball on the PR for the lifter.