These motors, in my experience, will fire right off after a good rebuild. They do require to be worked to seat the rings properly, but really don't need to be wound up hard to get or keep them running.
That said, most of us, as long as the teeth are in place on the gears at the front, use the same ones that were there, but there is enough slop in them from the years of use that there is often some benefit to doing a little timing by ear once it's running, as those gears, from the crank to the cam to the governor/distributor shaft, will have developed some slop. That's where the danger of retarding the timing too far comes in.
As a last step, after retorquing the head and running the valves after you've had it running well, I'd suggest you re-check the static (dead-stop) timing against what was done with the motor running.
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Today's Featured Article - Tractor Profile: Allis-Chalmers Model G - by Staff. The first Allis-Chalmers Model G was produced in 1948 in Gasden, Alabama, and was designed for vegetable gardeners, small farms and landscape businesses. It is a small compact tractor that came with a complete line of implements especially tailored for its unique design. It featured a rear-mounted Continental N62 four-cylinder engine with a 2-3/8 x 3-1/2 inch bore and stroke. The rear-mounted engine provided traction for the rear wheels while at the same time gave the tractor operator a gre
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