Too big? It may or may not be. Unless you know his setup, including what rpm he plans to operate in, intake/exhaust flow ratio of heads (which I bet he will get worked), valve reliefs, compression ratio etc.

I have no idea what works on mod motors though, because that cam does sound a lil wacky, just saying there are considerations in choosing a cam. What may not work on a near stock mod motor may work well on a highly modded one.