Hyd Roller vs Hyd Flat tappet on SM heads

cookietruck said
I ordered two valves to use as sacrificial valves so i can smooth the chambers a bit.
Ordered 5.015” chevy valves and will see if that helps the geometry. Thought i read the speedmaster +.100 are longer than that.

I used 5.010" chevy valves in mine, needed a considerable correction to fix the geometry with PRW 1.6 ratio rockers - I would recommend a call to Mike at B3.
Pushrod holes needed some clearancing with the kit but I used 3/8" pushrods.