Pertronix distributor install help needed

From discussions on this board, "it might be" that other dists besides Pertronix are not necessarily clocked as per original.

"Someone else" mentioned that the distributor gear/ rotor "can point to China" and the thing will still run FINE

Hell, my first 57 Chev, I wasn't even aware that there WAS a "correct" way to orient the rotor. I still remember a gas station jock who was checking the oil, tell me "It can't run, the distributor is out of time" after I had just driven the car into his station!!!!

Now this DOES MATTER on some engines. The "odd fire" V6's and some 4 whangers have every other pair of cylinders firing close together, with a big wide space in between. But "traditional" straight six's and V8's don't matter in the least