Interesting...I'll have to keep an eye on this. I also had no idea axles could be had for that cheaply...as a side note for anyone else with a '70, the axles are even cheaper ($100 each from Summit).
Now, if I can just find someone going from the '93-'97 LT1 rear brakes to the '98-'02 LS1 rear brakes, and a front big-brake kit to match