Well, the LS1 is ever so close to going into my '89 bird. The top end parts have all arrived(Z06 heads, LS6 intake, GMAF, and I'm working on a homemade CAI. I just have a few more parts to get. Here's my question: Has anyone just used bullets straight off of LT's. Emissions is not a concern where I live, but I'd still like to keep the sound somewhat reasonable. Any thoughts?