If someone wanted to do the math they could figure out the approximate rocker arm ratio using the cam lobe lift and valve lift numbers I posted. Valve opening was measured with a dowel indicator contacting the top of spring retainers. Would think if I added the .019 valve to rocker clearance to valve lift it would tell me real real close what the rocker ratio was on the measured valve.
Camshaft number I posted is the same cam as part number 49900DCX in parts book. If its a later print parts book or IH on the line lookup the part number will show 49900DDX. IH didn't use the 49900DD until 350 production was already underway. Then used as a replacement cam for previous models. Difference between a DC and DD cam was the cam gear retaining threads, right on DC and left on DD.
This was a used cam so may have some wear. Think I remember seeing that the specs said .270 lift somewhere when new. Can't be sure on that though.
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Today's Featured Article - Memories of a Farmall C - by Monty Bradley. When I was a child, my grandparents lived on a farm owned by a Mr. Walters. The crops raised were cotton and soybeans, with about forty head of mixed breed cattle. Mr. Walters owned two tractors then. A Farmall 300 on gasoline and a Farmall C, that had once belonged to his father-in-law, and had been converted from gasoline to LP Gas. Many times, as a small boy, I would cross the fence behind the house my grandparents lived in and walk down the turn row to where granddaddy would be cultivati
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