Engine Combo Question

I guy I race with built a 426 small block out of a MP Magnum crate engine. He used a Hughes engines kit and still has the cast iron MP heads on the engine. It runs 10's in the 1/4 in a dakota, but is not anywhere near as radical as you are talking. He rrcommended I build a magnum roller engine in stead of a flat tappet LA engine.

Bob