I want to do something very similar to those little dune buggies, but I am planning on making the wheel base a little longer(vw length maybe) and a little wider and a much heavier duty frame. maybe like a 3/4 scale fullsize sand rail. With about 15" ground clearance. With rear raptor drivetrain setup, swing arm setup for suspension ride. And IFS, but instead of a crappy little briggs, I will be dumping in a yamaha yzf R6 motor into that bad boy. If I keep the tranny which I pb will, and keep all 6 gears functional, then it will hit 100+ easy. I think I might pick up the old engine out of a buddies sprint car since he races them and knows all the little quirks with those engines. mmmmmmm can you say close to 150 hp in a 500 Ib 3/4 scale dune buggy.
Remington