I have gotten myself so confused on which spark plugs to go with. Anyhow I have a LT1 w/ a 306 cam, LE1 heads, a hair over 11:1 compression, and plan on spraying 150-200 shot of nitrous. So that is about 400rwhp + 150-200 shot. Which plugs and what gap? Thanks for any help.

 

I just put some autolite 104's in mine to get ready for the squeeze. Mines 12.8.1....