That head will be the limiting factor, but will be much better than any iron 289/302/351W head that Ford cast, even the origional '68 GT-40 heads fully ported will not match the AFR165 CNC for flow or velocity. That makes the intake manifold selection somewhat different---I would suggest a ported RPM Air Gap, or ported Victor JR to match the oval ports of the heads. Match every runner to 125% of the head's intake flow, and you will have the ultimate for torque and hp. Let me know if you need any help, I am retired, but take on a few neat projects like that to help out fellow racers. Joe-JDC