If you can find a 120Y Borg-Warner tailshaft, it's the same length as the Sunny one. The problem is the rear flange is wrong. The only rear flange that will work is from a Series 1 bluebird single piece tailshaft. These have the same 1 inch universal joints as the 120Y shaft. I've got one under my Sunny wagon. Hopefully these are a bit easier to find. The other alternative is to get the stock shaft machined out to take the 1 inch uni's. Why did they peen the bloody uni's in, that's what I want to Know!

Have you ever got one Machined To get the small unis out And what did it cost?

The only one I ever had was a 1200 ute tailshaft that had been modified this way that I bought from a wrecker. This was back in the 1990's, though. I can't even remember how much it cost. Sorry I can't help. With the borg warner one, I already had it in the shed, & the Bluebird shaft cost about $70. It had to be a series one 4 speed as they were the only ones with the one inch uni, all the other Bluebirds have a smaller one.