Next steps for more power - 318

I built a 318 some years ago and it was a screaming little motor. It was bored .030 with Keith Black flat top pistons, ported J heads with 1.88"/1.60" valves, comp XE 268H cam, Edelbrock RPM intake, Edelbrock 1406 carb, block hugger headders, and MSD 6al ignition. Fried lots of tires on a 2wd Dodge truck with a 4 speed.