In my opinion and with respect, The rockers and pushrods, and stands are all the same length between heads. The combustion chambers differ between Distillate, Gasoline, and (on later vintage heads that will fit an M) LP heads. This difference changes the length of the valves to get to the seat depth in relation to the engine deck. Thus any head rebuild (done correctly) would have the correct valves for the head installed. This is true even if the head was delivered with the wrong valves. The repair shop uses specifications for spring height, valve length, and other critical measurements to assure their repair won"t come back. If the work was done on a hollow core door behind the oak, on 9 cement blocks, and the valves were ordered based on the words M Farmall, the rebuilder is still at fault. If the tractor owner supplied the valves, and said "put"em in", or rebuilt the head in their own shop, then s/he is to blame. Jim
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Today's Featured Article - Ford Super Dexta - by Anthony West. The rusty blue tractor caught my eye as my truck zipped by the farm implement business. It looked so fornlorn amongst the lineup of newer equipment. But it was just the right size for my small farm. I stopped in and asked the proprietor for further information. "It's a 64 Ford Super Dexta", he said. "It's a tough little tractor, although it's a hard starter being a diesel and all." He did manage to get it running, compliments of a can of ether. Once started it putted along pretty good. It
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