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Old 08-01-2020, 06:22 PM   #54
Join Date: Jul 2010
Posts: 78
Default Re: Off shore adjustable lifters

I have installed a set of JAX adj. lifters (Vintage Valve Components) from Flathead Jacks made in California. The company quotes a rockwell reading of 55. After this discussion I checked the valve clearances and valve lift to determine if there was a problem. All was good. There is about 10,000 miles on them..
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