RE: Buggy to Truggy conversion
A 1/8th truggy differs from a 1/8th buggy in that...
1) It has a longer chassis and wheelbase
2) It has longer arms making it wider
3) It has much larger and wider tires.
4) It has a truck body.
Aside from that, the differences are incidental. Converting a 1/8th Buggy to Truggy involves changing the chassis, all 6 of the driveshafts, all the arms, usually the wheel hubs, and of course the wheels, tires and body. It is often more economical to buy a truggy kit outright.