OK, for silver gelatin projection printing with VC papers, and assuming you are doing rotary processing (since you note that you are working with "unicolor rollers"), I recommend about 9.5 minutes at 70 degrees F for Ilford FP4+ (and/or PhotoWarehouse ASA 125 film) in Pyrocat-HD, 1:1:100 dilution.

This should get you very close to optimum negatives for your printing conditions. Of course, test before developing your "Moonrise over Hernandez" negatives.

Good luck.

Sandy King