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 - Trenching With a Plow - by Staff. Introduction: This interesting information came from one of the discussion forums here at YT. We thought we should place it up front so it could be read by anyone interested in putting old iron to work. [Editor] I tried something new today, and it worked so well I thought I should post it - in case it might help someone else. I'm running 100 yards of 4" drain pipe from the gutter downspouts of our house to a pond down the hill. This should hel
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