I saw this TCI kit to adapt a 727 (torqueflite) Dacron filter to a PG racing transmission.
Seems like a good idea, finer filter & double sided.
But what is done with the smaller, square hole on the PG valve body?
This pic is of my PG filter with extension for the deep pan.

TCI-528505_FilterAdapter.JPGPG_filter_extension-25.jpg
1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1