It is possible. The cam shaft would need to be cut and rewelded (very straight and precision machine work) so the 1-4 valve timing is the same, and 2-3 timing also re clocked. Three cuts would be needed in the cam to make this happen. The timing would be such that 1 and 4 would fire together, then 2 and 3 would fire together, but like a JD it would be put-put, pause-pause. Ignition would be easier in that a single electronic trigger could be used to switch 2 cylinders at once. Some electronic fiddling would be needed. A JD distributor, and electronic trigger? Problems would be really nasty impulse over stressing of the crankshaft. Especially at the 3-4 area as 3 and 3 twisted on the #4 journal and at the rear main when 1 and 4 fire together. Twice the cam shaft loading is also happening as the cam opens 2 valves every time the lobes come around. Clutch stress and drive line stress would also be an issue to contend with. Doubling the torque instantaneously on the components is not wise. Intake systems and exhaust are designed to handle flow for one intake per 90 degrees. Not twice the amount, as would happen when 2 cylinders sucked air/fuel at once, and two exhausted at once. Much easier to ground #4 and #2 plug wires, and remove the rockers on them. Jim
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Today's Featured Article - New Hitches For Your Old Tractor - by Chris Pratt. For this article, we are going to make the irrational and unlikely assumption that you purchased an older tractor that is in tip top shape and needs no immediate repairs other than an oil change and a good bath. To the newcomer planning to restore the machine, this means you have everything you need for the moment (something to sit in the shop and just look at for awhile while you read the books). To the newcomer that wants to get out and use the machine for field work, you may have already hit a major roadblock. That is the dreaded "proprietary hitch". With the exception of the
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