Alfetta driveshaft removal
The entire drive shaft should be able to be wiggled out in on piece. It sounds complicated but it works easier than you think except for all the wrenching, that takes time.
After you get the exhaust and heat shield out of the way, start by removing the three nuts and washers from the front giubo, connected to the engine flywheel. You don’t need to remove the other three nuts, bolts and washers until you get the whole drive shaft out. Keep track of the nuts and bolts to make sure they go back the same way. It also helps if you have a bar jammed in somewhere to keep the drive shaft from spinning while youre wrenching. You will need to rotate the drive shaft to locate and reach each nut. You can easily do this with the wrench while the car is in neutral or in gear with the wheels, if its on a lift. The driveshaft constantly spins with the engine, so when you rotate it, it may build up compression. Of course you can remove the spark plus if needed but its not usually necessary. Second, remove rear giubo three nuts, bolts & washers that connect to the rear flywheel flange. Its OK if you remove all six on both ends but its just more work under the car. Third, remove the two nuts & washers holding the center support up and drop center support.
Next, you can try to lever the rear giubo down and out with a pry bar but its easier to remove the four large stud bolts on either side that attach the rear dedion cross member to the frame. You will need to have a jack or brace supporting the dedion, but with that loose the dedion can swing just enough out of the way on its rear support like a pivot. Its still connected by the shocks and rear pivot mount. You may want to check the rear transmission mounts at this time. Now you can pry the front giubo & work the entire drive shaft backward bit by bit, while sort of flexing the drive shaft down and away from the rear dedion. You have to remove the two bolts mounting the bell housing & the shift linkage assembly, as well.
After you get it out, make sure to mark the orientation between the two pieces before you disconnect the center, and insure they go back the same way for balance. Test fit the front giubo onto the flywheel to make sure it’s the right one. Also, keep the front band on the new giubo, it helps to guide it back onto the engine side easier.
Once the drive shaft is all together again, with all three giubos in place, work the drive shaft back into place onto the front flywheel. Dont attach the front giubo nuts yet, because you will need to remove the band before its all the way in. After you removed the band, try levering the center mount and rear giubo back in to place. You can slowly raise the dedion and replace the four mounting studs, loosely. You should be able to reattach the 3 rear bolts & nuts in the right order, then the 3 front nuts and then the center mount all loosely. Check for free rotation and then snug it all up and reattach the bell housing and shift linkage.