Gearbox help.

[THE "10" SILVERADO]

Recently stumbled upon a thread talking about swapping an XJ steering shaft onto a C10. This takes out the rag joint and replaces it with u-joints which is supposed to help with steering slop. Good news about this is I have a parts 87 Jeep Cherokee left over from another 87 project with my dad that I can simply pull off for free . My only question is will this work with the end fitting on a 77 gearbox? Of the 6 or 7 threads on here there seems to be a consensus that the ends changed somewhere between 77-79 and that the newer style will not work with the XJ shaft, but the end fittings can be changed (not sure on that, saw a post about it though). Does anyone know if it will work on a stock 77 gearbox? if not how easily can the gearbox ends be changed?

Thanks.