[Brad54]

I just bought half shafts as well and had to piece everything together from different sites. Some of the prices varied widely. Drive train America has a great selection and a great web site. Your Spicer series looks like 1350. What I bought was 1410 series. I found the part number in an old thread on this site. They were provided by Dave Kirkham I think, based on original shafts. I am not saying what you have won't work, just the u joints will need to match that series. Here is what I bought, noting that one of the parts did seem available any more and the shaft that replaced it was a little shorter. My problem is I have a salisbury 4HU from a XJ V12 and have now ended up with two male flange pilots on the inboard side flange yokes. If I can't resolve the problem with different flange yokes I will just machine the Spicer part since it was only about $30. not much to lose if I make a mistake.

Flange yoke 3-2-159
Ujoints 5-160X
Yoke Shaft 3-82-268x or 3-82-58x (later version still out there)
Slip yoke 3-3-118kx

Hope this helps.