RE: Separator plate gaskets!?
When i did the Jerry mod to the accumulator back in the day which comes with its own new gasket ring, My pan gasket was paper or cork material if i remember correctly. I now have a Ford rubber reusable seal on the pan. I dropped the pan every 8,000 to get the TC drained too.
Not sure if it helps or not, but get the rubber one that comes with the new filter. Now you don't have to worry about trashing the old one and having to take it off slowly. The rubber one just falls right off and wipe it with a clean rag.
By the way, I am selling the stocker tranny soon.
1995 DK Blue Lincoln Mark VIII
1998 DK Blue Chevrolet 1500 P/U
2004 BLACK/Silver HONDA CBR 600RR