A 2wd with an engine like that is too much for it and IMO i think its no fun to have a donut king, thats all you will be doin if you get down on the throttle slightly too much in the dirt. But as far as an engine, i pull start or drill start engine wont do nothin for you as far as speed. Get yourself a nice onroad engine if you have to have speed. Cause offroad engines are made to have mostly bottom end power, not as much top end power as an onroad-spec engine. The hellfire isnt a truck to go fast with, but you can make it do that if you have the money