I'm pretty happy with the max HP from my stock manifold 464 build. (see below dyno run). But, I didn't expect max HP at only 4800 when we designed the cam. (see cam card below). So, I'd like some advice on whether I should try to retard the current cam to raise the RPM range or just go for another cam. This cam has a very mild idle. My engine build is below my signature and basically it's a 10.5 motor with TA Stage 1 heads with additional porting, stock valve train, stock exhaust manifolds, Performer intake with a QJ. I've got plenty of room for more valve lift (pic of pistons below) if I need it. Again, I'm pretty happy with HP but would like peak RPM to be in the 5200-5500 range. Low end torque is currently outstanding and then some.