Hi Hank,
I know there are a few asf members that do good tranny work. I am not sure of there experience and/or comfort level with working on split cases. Many "split case" cars have had their crashboxes long replaced with more modern trannies.
I have been doing some research, as I to have a split case that needs to be checked. Apparently Ed at the Bug Shop uses an "oldtimer" that has lots of experience with crash box trannies. This guy is in Kelowna. If you are still searching you may want to contact Ed for more details.
Good Luck, Phil.