Calculate the maximum torque that the stock engine provided at 800? rpm and take that figure and multiply that by the correct factor times the rpm of the donor engine and see what that hp figure was. The old engines put out gobs of torque and that is what the gears deal with. As long as you have adequate lubrication, they don't care much how much rpm they see.
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Today's Featured Article - Women and Tractors - More Views From the Farmer's Wife - by Teri Burkholder. The top ten reasons why the judges wouldn't let you participate in the stock antique tractor pull: Hey, this is stock! It came with that V8 in it! That "R" on my tires stands for "really old" not radial! Blue gas? We thought it was a pretty color! What wire hooked to my throttle?
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