600 Holley Double Pumper on a 318

I'm just getting my engine (318 LA 2 BBL auto) rebuilt and pushing the HP up to about 225. My wife (bless her soul) bought me a Holley 4150 600 CFM Double pumper for Christmas. Anyone know of any issues with that? Is it to much/too little? Also the engine shop recommended keeping the original heads rather than switch them to 360's to keep the torque up in the engine. As usual all comments greatly appreciated.

Merry Christmas!!

Mike