TF-727 trans cooler lines

Drag car.
Any weight moved from the front to the back is a good thing.

The cooler has a filter also, that's why I need to know in vs. out for the lines.
Want to know the PSI to pick the right hose and fitting set up. It will transition from NPT to AN.
The trunk is vented through a 'diffuser' mounted to the spare tire well floor. There will be negative pressure in the trunk. Between rounds the lid will be open and the cooler fan running.