Thanks for the tip Mike I will try that.
Its been a frustrating day here....and hot. I think that my driveshaft is actually a little smaller than the newer ones. The alignment tool diameter is 1.015" where it is supposed to slide into the coupler.....notice I said supposed too. It doesn't. I looked around and according to the drawings I found, it looks to be the correct size for an alpha. I bought a 1" wood dowel rod and measure it, it was about 1.005" It wouldn't fit either. I sanded it down a few thousands under an inch and it went in with a little effort. I also have a spare coupler, and checked it as I went, same story. I also checked to see if the drive shaft would slide into my spare coupler, did so nicely. So do the early drives have a smaller driveshaft? I think I am going to take it to a fiends shop tomorrow with the spare coupler and have him turn it down .017 or so.
The other issue I have is that the motor is way out of alignment with the gimble bearing (checked this with the wood dowl). Its like the engine needs to go even lower in the front....and I have adjusted the mount almost all the way down. Maybe I got the mount to tall when I made it, but I was pretty careful, seems odd to be off this much. I did compare the engine mounts and brackets between the 165 and the 120. Everything was the same except the 120 uses two different motor mounts in the rear. The 165 uses two that are the same, and correspond to one of the 120 motor mounts. I'm wondering if the one is shorter or something? I'm not sure if I used the 120 or the 165 bellhousing....so maybe its the motor mounts or maybe I just made the front mounting block too high.
I think when it cools off tonight I am going to raise up the front of the motor with the lift, pull the front mount, lower the engine down even lower to see if that starts to fix things. I don't think it will as out of whack as it is, but maybe that will eliminate the front mounting block as being the issue.