I want to clarify what I mean by the step on the bolt. When you clamp down those bolts you deform the ends and you cannot get them back out of the hole if you need to. The threads are deformed and too large. Therefore, if you put the bolt in a lathe and turn 2 threads or so down to the root diameter, essentially creating a step, you deform the end but don't expand threads (you have clearance now) and you can therefore get the bolt back out of the hole. If you don't have a lathe a grinder can be used in a pinch if you are careful
The jam nut is needed because no matter how hard you clamp those bolts down the vibration and banging will loosen them and you'll have to retighten every round. Learned this the hard way.
A 2" bolt is long enough. Actually about as long as you can use on the hole closest to the block / oil pan.
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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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