Though I’d still get rid of that cam. NOT a good choice.
(IMO, the smaller cams recommend need a really good head port to make 400 HP. No matter the cam chosen, get a well known head Porter on board to get the best bang and head flow for the money spent.
Your cylinder heads will make or break the engines performance in a big way. If you find the porting price is distasteful, look into selling the heads for a set of trick flow heads. OOTB, there head flow will cremate very well ported iron heads for a reasonable price. Just lift the valve up to take advantage of the heads capabilities.
