Anybody have any experience with this set up. '97 chev C1500 w/ 5.7 Vortec engine 161K miles. Someone installed an BBK throttle body, Cold aair intake, and MSD ignition on it. It has a 6A ignition box, replacement coil, correct harness to hook into the system. It runs fine below approx 3000rpm then falls on it's face. Thought at first that it was a weak fuel pump, but a friend checked it and said it was within normal range. Wondering if anybody has any experience with the MSD set up on the Vortec. I was thinking maybe the 6A ignition box was acting up or something. If anybody has any input on this I would appreciate it.