the way you drive has alot to do with how that r/p is going to wear.
if you come down from jumps on the gas, and essecially if you land on your back tires 1st on the gas, its going to put a ton of stress on that rear r/p causing severe wear compared to your boy, that prolly drives somewhat "normal".
i would think, as easy as possible, landing, and then planted all 4, accelerate.. would be easier on eveyrthing, r/p, outdrives, and dog bones. rev'ing the piss out of the truck, and letting it land with power to the wheels, its going to wear on every part of the drivetrain. but thats how you get around the track fast.. so its a give and take.
that 4 hour endurance race.. is it worth a DNF? you might want to consider changing that r/p if your shimmed all the way to one side.