But I think if I were going to try to do this, I would forget the cam and and remove the cylinder 3 and 4 push rods on an overhead valve engine. Then build a bridge between rockers for cylinders 2 and three so cylinder 2 intake would open cylinder 3 intake and cylinder 2 exhaust would open cylinder 3 exhaust.
Then I would modify the rocker shaft so it is free to rotate, and consists of a shaft in a shaft. The internal hollow shaft should be fixed to cylinder 1 and 4 exhaust valves, and the external shaft is fixed to cylinders 1 and 4 intake valves. You might want to reinforce the push rods but for no more hours and low speeds you should be running it, the cam, lifters, and push rods should handle the load.
If you were going to try to modify the cam I think I'd get two cams and put another front section under 3 and 4, and instead of welding together, come up with a coupling type joint so each shaft can self align. Then all you have to do is regrind the rear shaft bearing journals.
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Today's Featured Article - Upgrading an Oliver Super 55 Electrical System - by Dennis Hawkins. My old Oliver Super 55 has been just sitting and rusting for several years now. I really hate to see a good tractor being treated that way, but not being able to start it without a 30 minute point filing ritual every time contributed to its demise. If it would just start when I turn the key, then I would use it more often. In addition to a bad case of old age, most of the tractor's original electrical system was simply too unreliable to keep. The main focus of this page is to show how I upgr
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