I have a 2003 6.0, l92 head, comp cam, procharged silverado with a 4l80e with a 3600 vig stall. I got it fully dyno tuned but my only problem is the torque converter locks and unlocks at low speeds. I also got a po300 misfire code once but it has not came back. not sure but it i think it started happening after i installed my l92 heads with l92 manifold and went up to a 90mm throttle body from a stock 78mm and a dr x link to run the 90. any advice would be great thanks