I'm from FSC, kinda left there, went to GMFS 2 days ago and found this site. My GMT 400 is a '94 GMC Sierra SL C/1500 RCLB with a V6 and an auto. It's mostly stock. It has a TB spacer, pod spacer, V8 air cleaner, Hypertech power charger, MSD wires, MSD coil, dual exhaust, dual Thunderbolt cats...