Lil Big Rig, a company out of Nashville (duh), has come out with a conversion kit ($12,950) that will allow you turn your late 80's to early 1998 2WD Ford F-250 truck in to a miniature Peterbilt, AKA Lil Pete. Chicks dig it, pictures don't lie.
If you are a Kenworth fan, fear not, they have a kit for you as well. The Lil Kenny conversion will turn your long bed full size Chevy pickups from 1973 to 1987 or a 2WD Dodge 1500/2500 from 1994 to 2003 into a mini semi truck.
The Lil Big Rig conversions even include interior components like a trucking dashboard, a sleeper compartment (where the magic happens), etc, The kits are supposed to be pretty easy to install and require no welding, just grinding and wrenching. Yeeee haaaaaw.