Why do you think you need a rebuild? Unless something is obviously wrong don't bother.
Carefully. Those spark plug wires will knock the crap out of you if it grounds through you.
Concur. Doesn't sound like there's any reason for a rebuild. Hopefully his mechanic would say the same.A rebuild won't cost more if there's a failure first. You'll still have to go through all the same steps for a quality rebuild. At that rate, you might as well buy a junkyard engine and rebuild that one. Then you just swap them out whenever you like. Without time constraints the quality of the job will likely be better.