What year joint is that from? Was it similar to the one in my picture before you separated things?
If you've taken measurements and everything fits, that's great. I didn't have the luxury of having the tranny out of the car at the time. Also, in regards to the longer bushings, they may help, but most of your load is going to be at the edges. I guess you could look up the material properties for the three bushings in question and see which ones are tougher/harder, as they would wear better.