Quick question.....

I am installing a 1976 350 Chevy engine into my 1950 1/2 ton Chevy pick-up. I am installing the distributor into the rebuilt engine. I have set the engine to TDC. However, I do not know (do I see where it is marked of the distributor) which pin on the HEI distributor is #1. Which one is it? Also, what are the wire locations for the other cylinders? Thanks!