If I was getting rid of mine, I might consider one of these heater/AC units.
It is a lot better looking rig than these for the same $$$$.
http://renegadetrikes.com/html/trikes.htmBut, these have a bigger engine, up to and including a 502 Chevrolet.
Mine is a 383 Stroker w/207,000 miles on it, and still running strong. Right now it is in the process of getting disc brakes on the rear for better stopping power.
