I've had an Inland Empire aluminim shaft in my hot rod for about 4yrs., with about 600 miles on it. Not a race car, but pretty hot 470" low deck stroker & a fully comp 727. I do tend to abuse it some. Today I found the rear yoke totally worn out (loose) around the u-joint cups. IE is sending me a new yoke I'll have to swap onto the shaft. Cost from them is around $100 to my door, and I've got to see if any local driveline shops can handle aluminum shafts. I thought these shafts would last longer than this. Should I change to a steel shaft?