if you want to get the most out of a cam on a gen1 SBC and still be able to drive the thing a little, or at least not have it give you a huge attitude getting through the pits, i would suggest going with a 4-7 swap firing order cam.
you can run more cam, make more power, have less valve train harmonic, better idle quality, and better throttle response all out of the same cam specs. it really is a good deal, just have to pay the extra couple of bucks to switch from an off the shelf cut to the "custom" firing order.
the only change to the tuning of the engine required is to switch the 4 and 7 spark plug wires.
