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Charles Stewart · 05-31-2024, 09:37 AM

And if you have the tools, the extra parts and some "research time", you can also explore those two accepted tolerances:
-Cylinder heads are additionally restricted in that they must
retain original-size valves at original angles +/- 1 degree
-Valve-diameter tolerance: +.005-inch or -.015-
inch from NHRA Specs.
It can be negigible or you can have something extra there...

05-31-2024, 09:37 AM	#5
Charles Stewart Member Join Date: Jul 2016 Posts: 389 Likes: 1,655 Liked 753 Times in 213 Posts	Re: OK, Stocker "valve jobs". And if you have the tools, the extra parts and some "research time", you can also explore those two accepted tolerances: -Cylinder heads are additionally restricted in that they must retain original-size valves at original angles +/- 1 degree -Valve-diameter tolerance: +.005-inch or -.015- inch from NHRA Specs. It can be negigible or you can have something extra there...