It sounds like the classic TFI module going bad and I know you just replaced it, but maybe pull it off and get it tested at Autozone, Advance, O'Reily, whatever chain you use. Have them test it 3 times so it gets hot. New parts don't always mean good parts. Just an idea and it's free.
306 with all bolt ons, cam, ported E7's, T5 swap, full exhaust, 3:55's, 2" drop, and the worst paint you'll ever see or feel.
Dyno'd 300/316, 2745lbs-track scale
12.4@108, 1.66 60ft on 8" ET Drags.