I bought a v6 HEI and I had a v8 HEI. both fit in the motor and mount up and everything and the caps interchange. So I believe the base is the same but you have 6 and 8 pole caps and the coil mounts different on the cap. I need to figure out the firing order too.
Also, I have 3 HEI bases. one is just vacume advance, one is vacume and it has an extra 4 wire plug on it, then the last one just has the 4wire plug and then of course all of them have the 3 wire plug going to the cap.
my question is: Is the 4 wire plug for an electronic advance? I have the one with the 4 wire plug and vacume advance, but do I need to hook up the 4 wire plug for it to operate right? the one I have with just the 4wire plug can I convert that to vacume advance?