318 with pertronix flamethrower II billet on the dyno

stixx said
Peak torque is really high in the curve for that cam...

Yah, it looks like 5600 is where it started getting lean cause (I think) the float bowls were running out of fuel. Otherwise it looks like the torque peak might have been at about 4800.
Seriously considering going FiTech EFI.