got me an 8.8 with a flange yoke. is there a yoke that'll
take the stock xj ujoint?

yes advance adapters makes it its like 50 bucks

Actually, Spicer makes it and you can get it at any Spicer dealer for $20. I forget the part # ????? Do a search for it I'm sure you'll come up with the part #. They make them for 1310 joints, 1330 joints and so on. You need the one for 1310. A driveshaft shop who deals in Spicer will have it too.

very cool, thanks! Time to search for a part #

Or call Jesse at High Angle Driveline (http://www.highangledriveline.com/) who can probably give you the part number and a good price to boot.