Quote Originally Posted by Matt167
on my dads '72 C10, he used an unfused ign on part of the fuse box, it had a male spade on it, he just hooked a female spade with 12ga wire on it, to the HEI, worked perfectly
....Yes mine has that terminal on the fuse box and is marked unfused ignition,I will use that to power up the Hei! I am using the old #4 connection on the regulator {new 1 wire alt now} That used to be the field wire to power on/off the relays for the fan and fuel pump .
The relays should be key on/off power ,along with the Hei. Thats the plan anyway.