hughes or comp camshaft

Maybe it's good to mention the engine is going into a stock 1970 challenger with a four speed, 3.23 rear and 255/60/15 tires.
The plan is to build a moderate street engine. No strip!
It has to be a reliable, good running, high torque street engine with decent fuel economy. No high power high revving strip motor.

crank is a cast eagle unit with I-beam rods and KB356 pistons

Thanks

Antoon