I've seen them used on the rod bolts of just about every flathead MOPAR six I've ever opened up. They don't work any better there than they do on GM products- - - -they're just excess hardware. I've found more than a few buried in sludge inside an oil pan.
jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!