After doing some research, and deciding to go with Longs for replacement birfields, I went about trying to figure out how to install the Aisin hubs with the longer birfs. After several ideas and decided to go ahead and add another groove to match the location of the shorter earlier birfs. The following pics are of the modified long and the install.
1. upclose of the OEM birf and modifed Long
2. Installed and sticking out of spindle
3. Full shot of both birfs
1. upclose of the OEM birf and modifed Long
2. Installed and sticking out of spindle
3. Full shot of both birfs