the reason for the chain i made a custom set of headers because no one makes them with two inch primaries for that truck unless you want to spend 1500 so anyways because of clearance issues with the transfer case and front drive shaft an diameter of the pipe i had to hold them kinda tight to the frame im afraid when i put my foot in it there could be a problem plus the less the engine rock more power going back where you want it i could just go two wheel peel seeing how its gonna be a pavement pounder i live in Vermont i my be tempted to go offroad want 4 wheel i have six inchs of lift and thirty fives under it