Some Details:
I got the Spiderbox for free and it currently has no engine.
I want to make it powerful enough to move around with my wife and I in it.
The buggy (410 lbs) plus two adults (315 lbs) makes the loaded buggy to be about 725 lbs.
I am currently leaning towards a 13hp Predator 420 with a 40 Series Torque converter. I am thinking of gearing it low for a target top speed of 30 mph, this should allow the buggy to have fairly healthy acceleration.
Feedback welcome