Re: hei distributor
Jerry, one of the great things here at TC is the amount of info available with a search. If you search "HEI fit" you'll see 7 pages fo threads, and more than one of them discuss whether a big cap GM HEI will fit a 1st gen, and which motor mount/frame stand combos seem to provide more clearance than others. Then you figure out what style you have, maybe take a measurement from the center of your existing distributor to the firewall as a double check, and kinda go from there.
As far as power supply, the cleanest way is to remove the existing cloth-covered resistance wire from the engine harness connector and replace it with a 12 gage wire to the "BAT" terminal in the GM HEI; if you just use the resistance wire from the points dist, it won't give a full 12V to the HEI. You can also properly tape up/abandon the yellow wire from the starter to the coil; this was a full 12V supply to the coil/dist only when the key is in "start" and the starter is engaged. Because the HEI will get 12V from the new feed wire you install, you don't need the yellow any more.
69 'vert project big block/TKO 600 RR
68 'vert driver RS clone -- gone!