You'll never kill that old Conty, they're built like a tank, and the HP/Kw output is so low, there's hardly any stress on any internal component.
I have one in a V60B Cat forklift, I bought it with the engine totally rusted up solid, the idiots that owned it previously left the exhaust open to the weather for years.
I stripped it down and I've nearly got it all back together, and the size of the internal components is amazing.
Didn't have a lot of trouble getting parts for it, but I believe the parts are getting harder to find every year.