Sounds like you either stabbed the distributor wrong or got a couple of the spark plug wires crossed up. Firing order is 1-3-7-2-6-5-4-8. Try restabbing the distributor; bring the engine to TDC on #1 (put your thumb over the spark plug hole to make sure you're on the compression stroke) and restab the distributor so that the rotor is at 12 o'clock (or just between 12 and 1) with the TFI module at about 30 off the centerline of the engine. Start with the rotor at about 11 as you insert it so that when it seats in the distributor gear its pulled towards and slightly past 12 o'clock.
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Jeff Chambers
Trophy Stock #3
11.86 Seconds / 113.8 MPH
Chambers Racing Team