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hotrodcbx · 08-01-2020, 06:22 PM

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..

08-01-2020, 06:22 PM	#54
hotrodcbx Senior Member Join Date: Jul 2010 Posts: 136	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..