371 build W/Big Mouth heads

They designed W2/5 stuff for stock stroke motors.
No eddie type head will ever be too big for a stock stroke smallblock that is making any steam at all.
Modified or not, they are still just a factory replacement head.

Wide LSA cam might or might not look good on the dyno, but i can almost guarantee you any car its put in will be a dog out of the gate. Been there done that with 112 stuff in a smallblock drag car that isnt a lightweight gutted ride