I dont think you can use this setup in the hanging type frame now that i think about it my old 65 and my 66 both have two piece drive shafts but no slip yoke in the middle
heres the og pivots all in a line
heres the new setup to different pivots the bearing would have to move quite aways towards the trans to work which means a new bearing crossmember
If it was me id go to the junkyard pull a o.g style driveshaft and weld up the hanging style bearing so its stronger and be done with it before id waste anymore money trying to make this setup work