Stock 318 building with Justin

Then what's wrong with the Schneider? Not enough low end torque?
I almost put the Schneider in my 340.
Thing is the heads peak near around .550 and I would be leaving power on the table...and i wanna see the seat of the pants feel with the same cam I had and the now ported x heads with chevy valves. Like ...I wanna how much of a power improvement the heads are. Lol