Ok, Been doing some homework on this and have found some great info...
Been studying up on the GM coils and have figured it out! LS1 coils are good- make a great spark- LS2 coils make a better spark- truck/Yukon coils make the biggest spark (the LS2 coils are like $120+ from autozone and Yukon coils are $50). Now I went to Autozone just for $hit$ and bought a Yukon coil. Its a little bulky for what I want to do with it but it will work. Then, I bought a 2001 Mustang GT coil boot (for COP) and was screwing with the idea of running this boot (with it's solid spring contact instead of wires with a lot of resistance) with the Yukon coil. Drove home as fast as possible to fit it on motor and it actually got it to fit. Now I will say it is a pain in the a$$ to get the boot onto the spark-plug, but it does eventually go on with enough poking and prodding. The 4 valve cobra boots are better for our motors because they are a tad longer and I wanted to use them, but Autowhore had none in stock.
Now, I am going to search on-line to see where I could get OEM Gm units from and that is what I am going to fire my car with. The coil P/N from GM is D585 Yukon coil and it can be identified as the one with a little heat-sink on it.
Check out these sites below for some convincing info- the video gets a little boring after a while but shows real data about the coils.
First this video:
LS2_Yukon_ign_coil_test.wmv
Then, from the RB/Skyline forums:
My LS2/LS7 Coil Swap: RB20 / RB25 / RB26 Forum: Nissan Forums / Infiniti Forums - NICOclub
