Not to be negative Speedy, but what is the purpose of the aluminum drive shaft? Save weight? Have issues with the flex plates? Think it will cut 60' times? Seems like a lot of work for a small improvement. I know of no other test of the stock drive shaft than Jim's V-8. Neither of my cars have had any issues. Especially the blue coupe with the 3:46 gear. If anyone was going to have drive shaft issues, I would have thought it would be me or one of the V-8's. I do see more re-enforcement of the torgue over in the rear end, but that is a suspension problem not a drive shaft issue. If it proves to improve 60' times, I will be impressed. I have my doubt's though. 60' times is more of a hooking up issue. Right suspension right tires and tire pressure. We won't even talk surface prep. Good luck to you on your quest for faster times though. Nothing wrong with that.