Hey Matt, before I go about figuring if GM coils work, I need to see how these G3 coil packs work under boost. Here's a pic of my time slips from my boosted 5184lb truck... a little fuzzy so I'll lay it out.

1.48 60'
4.36 330'
6.87@97.33
11.05@113.45

What's wrong with those time slips?......Alot!