A chain of recent developments have been made concerning the RC truck.
Possibly THE most important is the simple fact that I have gotten a replacement carburetor for the engine and after bolting it in place, the engine started and ran on it's first crank and has been running properly ever since! I will post some videos soon, once I am able to take them.
Another important step has been the finding of proper axles, evidently as many as I want at VERY reasonable prices! The selection includes plain axles with a differential and sprocket as well as motorized axles from common "mobility scooters."
A co-worker of my father's has offered an RC transmitter and receiver pair as well as 4 servos for as little as $40. There may be an issue since the system is of the older AM band and may or may not work properly in the presence of electrical interference from the engine.