Driveshaft length charts are nuts
So I came up with 51" and I found one that seems to fit.
It came out of a 72 valiant with a 904 /7.25
Yet it seems to fit a 74 duster, 904/ 8.25 perfect
The only concern is it the skinny one so I have to do some research to determine if the diameter is enough to handle the 360.
If it will, then I saved money and clean it up and i will replace the u joints and use it.