[DanEC]

It's odd that I don't ever remember anyone fabricating small diameter, heavy tube half shafts for old, high HP 63-82 Corvettes. They are know for suffering their share of half shaft and U-joint failures over the years, especially with sticky tires. When I tore down my 66 427 Vette to restore, I found one of the half shafts on it had started to twist - fortunately it had only gone about 5 to 10 degress however. Usually the racers or big HP guys migrate from the original 2-1/2 dia shafts to the later 3 inch half shafts, or spend some money on some custom, large diameter tubular ones.