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Doing a summer time maintenance check on my snowblower and the valve stem caps are exactly the same as what I have on the Corvette that I bought off eBay
What Barry is describing is the valve stem cap that would pass NCRS judging for 70-72. I sold my small 2005 Carry on trailer a few months ago and checking the tire pressure found the same caps.
Barry, we can supply our caps from a snow blower and a trailer to someone having their car judged and get no deduction.