I have seen the tab set that Hank was referring to on one of the stock motors that I bought and I know it revved over 6000 RPM. They just went across between adjoining bolts and the tabs were bent up against the side of the bolt so that you had to flatten them out to put a socket on the bolts. Another item I have heard about from an "old time racer" was that instead of using loctite, he used good old IODINE from the medicine cabinet. Sounds funny I know but this guy raced Chevy sixes for at least 40 years and was always a front runner.....
