I would keep the ball and trunion if it is in good shape, as it is stronger. There are front wheel drive cars you can use the boots off of. I can't remember which one it is right now though.
The slip spline housing with u-joint and plate is bolted to the trans. flange, and the drive shaft spline is welded. I got mine when it was balanced from Driveline service of Santa Rosa, a chain, individually owned. $75 extra. 1978.