I posted recently about driving with open headers and let me tell you...what a blast. I didn't just drive for a few miles either, I put about 50 miles on my truck like that. I did finally go get some 40 series flowmasters installed this morning and it does sound a lot better but it was fun while it lasted. Here are some quick specs on my truck... 1971 Chevrolet Blazer Brand new 260hp GM performance crate motor (it's not alot but i'm just happy to have it running) SM465 NP205 32 inch cheapo mud-terrains stock suspension The engine is pretty basic: HEI, Performer intake and carb, basically bone stock, but it runs great. I do have a billet steel flywheel and dual friction clutch that works great too but that's about it. Plans inclde 6 inch lift with 35's ( I refuse to trim the body, I like it too much) probably going to go with a 35 spline 9 inch over 14 bolt just cause I want to and keep the 44 in the front. I might go bigger later but I really don't see myself going crazy in this truck, if I want something to beat up i'll buy something that isn't as hard to find and beat the hell out of it.