I am not sure it is worth worrying about.
my car came out of chicago, so the driveshaft is pretty pitted.
but it doesn't have any significant horsepower to worry about twisting it or anything.
I am going through the driveline now, and noticed how rusted it looked.

1965 coronet with a 5.9 mag in it now. was originally a poly. original 273 gears.
do I just wait for it to fail if ever, or is it not even worth worrying about?