Grinding the valves on either end wont help in this instance. The extra length is actually in the stem. According to caseih, the valves I ordered and received match the serial number to the engine. They however do not match the valves that came out of the engine. My only concern is valve seating pressure at higher RPM. I am assuming that other people are rebuilding engines with the same valves and springs. I just hope there are not other parts that might contribute to unforseen issues.
I will check things out well before starting... Thanks for your advice.
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Today's Featured Article - Oil Bath Air Filters - by Chris Pratt. Some of us grew up thinking that an air filter was a paper thing that allowed air to pass while trapping dirt particles of a particles of a certain size. What a surprise to open up your first old tractor's air filter case and find a can that appears to be filled with the scrap metal swept from around a machine shop metal lathe. To top that off, you have a cup with oil in it ("why would you want to lubricate your carburetor?"). On closer examination (and some reading in a AC D-14 service manual), I found out that this is a pretty ingenious method of cleaning the air in the tractor's intake tract.
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