Here in So Calif a lot of gear heads use Royal Purple
Synthetic or QMI/Ever-Wear gear treatments. The guy who used to rep the product was Charley Quarelli at 1-800-755-7833. I know he is personal friends with some of the Unsers and the Tommy Edwards of Edwards Engines in New Mexico. You may want to call him (assuming I have the phone # right) Hope it helps.
ps bet that motor sounds real sweet at 7 grand...
bc SoCal