Looks like I've got more work to do since reading the wisdom of you guys. My original plan was to install the muffler right at the front of the bed , behind the cab, now it looks like I'll be getting another piece of pipe ( it's 2" dia) and moving the muffler on back towards the rear axle...
I can't really understand why it would make any difference, but you guys say so...it must be true...Thanks