[Class of 69]

Tynee, I didn't feel it was fuel caused, but i may have to rethink that. The miss appears so suddenly, it's like the ignition switch is being turned off and on quickly. There have 3 times now when at a stop light , it just starts running really rough, and allmost feels like it will die. but when the light changes, and i give it throttle, it comes around again and runs smooth like nothing ever happened. Are these TBI's dependant on constant fuel pressure, unlike a float system?? The truck just turned 103 rounds, so any thing is possible. I put in the MSD Blaster coil, and Accel super stock wires, cap, and rotor. Stock AC plugs. It starts much quicker now, and runs very nice... until it starts missing!!