Gm hei conversion ignition coil.

Really does not matter which coil, but for the stock look the Pet III goes in the coil holder and you can use the original electric coil wire. the GM you have to find a spot. As long as it has around .03 ohms you are ok. Like RRR said get it running first if your curve is wrong it won't help anything at all. Tune it then figure out what it needs to run stronger.