Sounds like a good idea. 455 Buick engines used a motor mount bolt for the ground cable from the factory. I solved a "slow crank when hot" problem for one of my students whose family car had that engine by cleaning the mount with a wire brush and installing a new cable connector and bolt. That one loose, dirty connection was robbing 1 1/2 volts during cranking. The allowable voltage drop was 0.1 volt for any connection. His mother had already bought two batteries and an alternator from local shops before I got to it.
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!