Here's my interpretation-
The dipstick needs to have a flippy lever similar to anything GM OEM post 1997
And the tube top just needs to be bolted to the head or bellhousing bolt.
AKA they just don't want flexi lokar style dipsticks that can fall over on a launch and dump ATF on the exhaust.
But yeah whoever they hire to write the standards at NHRA wouldn't last a single day in ASTM, SAE, ISO or any engineering related safety standards field. Everything in their standards book needs to be read 5 times to understand and they repeatedly use circular reasoning. What does 'meet NHRA spec' mean? Is there pull force or pressure blowout requirements? They should word it as the following-
Dipstick shall be mechanically retained within the tube to withstand X lbs of pull force. The tube or sheath shall be fastened to a rigid member within X inches of the top.
The problem with NHRA specs is it's entirely up to the discretion of the inspector which should NOT be possible.
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