when i said bigger driveline in the other post i meant the shaft part that goes through the bearing, I dont know if the overall drivline is bigger or not.
also looking at your pictures again its hard to see if you not have a transmission mount in the back? if not i would get one and put it in it will help with the tailshaft being at so much of a angle,and id put it in before i had the driveshaft remade.
heres a idea if you wanted to lower the center bearing(if putting a trans mount in doesnt help the angle) is to bolt a piece of flat stock and bolt the bearing to it,might not have to go as low as i drew the line, you could use the stock photo of my driveline for reference to where the bearing is in relation to trailing arm bolts..... i drew a red line representing the piece of flat stock:
