If you have the tools, machines, know how and money you can do just about anything. Buggies make great racers and decent bashers. Monster truck are much better bashers. Why not look in to a Savage X SS Kit and then lower it. To makes something from scratch which can be done but will be VERY expansive and take maybe years of work. A buggy was not design for transmissions even thaw a few have them or can be installed but not your true racer. I do not know of any that have reverse.