Perceptol is probably an interesting developer with Tri-X, but the speed should be around 160 or 200. If you've exposed it at 320, it's probably a good idea to wait until you have another developer in hand.

If you want to give it a go, try using the same time as Microdol-X, which is similar to Perceptol. I did a quick check on the Massive Dev Chart, and Microdol-X and Perceptol times are the same for HP5+, so I'd guess they wouldn't be too far apart for Tri-X. Test one sheet first before running the whole batch--maybe 8 min at 68 deg. F. in Perceptol stock would be my guess (Ilford's recommendation for TX 400 rollfilm is EI 200, 10 min. in Perceptol stock, for comparison. Sheet film should be a little less due to constant agitation).