Tim, right you are. I just looked again, and the muffler is on the same plane as the rear axle, so I will need a bend over that. Also, the hanger location will require a slight bend to the driver's side. So much for the "straight pipe" idea.
As for which model of 3100 I have, I guess you'd call it a short-bed pickup. At some point in the past I wrote that I have a 3104, but I don't know what prompted that or what would make it a 3104.
Thanks.