flathead build

[chicknlittle]

I have made up my mind to rebuild my mercury engine do to what I have found while tearing it down to replace chipped piston.Heres what I got a set of offy .400 heads and duel offy intake and 2 94s to go on it I will bore the block only as much as it needs to be to clean up.This is my first flathead build and it will be going in a 51 mercury what cam should I run I would like a little lope. thanks Jimmy