I'm in Atlanta (about 1,000ft elevation) and recently put a holley 570 with edelbrock intake on my truck. I do not really like the way it's running (it an improvement but i think I should have gotten more performance than that) and I've taken it back to my mech. to see if he can (again) get it running better. If he has no luck I was wondering if it could be the jets. I've heard of Holly sending the incorrect jets befor. He has a set of jets for it if we need them but I was wondering what #jet came in the 570 orginally and what I would need to switch to for a trial. Any ideas? Thanks.