A trick we used on the dirt track cars was to use a small cooler for the rear axle lube- - - -made from the condenser coil for a mini refrigerator. The flare fitting for the flex tubing from the rear end to the cooler was drilled and tapped into the rear end housing where the spray from the ring gear gave enough pumping action to move the fluid, and the return line was plumbed into one of the axle tubes near the center section. It made a LOT of difference in the rear end temperature.

Too bad you're not closer to Tennessee- - - -I've got a water brake bellhousing dyno that has handled up to 700+ HP so far.
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!