Driveshaft spline wear

[35ragtop]

Hi all,
I am wondering if anyone has tried this idea? (1948 Mercury)
The splines on the diff end of my solid driveshaft are worn so that the spline coupling is a bit sloppy. Getting another driveshaft in premium condition is almost impossible, so Im wondering if welding the coupling onto the driveshaft would work. The earlier V8,s had the coupling welded onto the hollow shaft.
Are there any metallurgy issues with doing this?
I would like to know what others have done, as getting the shaft built up and re-splined is a big deal cost wise.
Dave