I've tuned a couple heads/cam LSx cars and just bought an 06 LBZ truck. At some point I'll start tuning it after quite a bit of reading. I was wondering what you guys use for fueling and spark verification? On the gas engines we use wideband for AFR and knock sensors for spark. I'm guessing EGT for fueling on diesels? If so what's a safe range for EGT's under load?