I just got one from Chevyracing that I think was from the 465. The long end of the shaft was shorter then the one from my HT350, but when extended was longer then mine (which had a bent spline and wouldn't extend more then an inch).
I haven't figured out if it is indeed long enough. I was hoping it would be since I'm going with stock height, but I haven't done any max calculations yet to ensure I'm safe.
I may have a "like new" front drive shaft for a 465 available... /forums/images/icons/confused.gif