This thing with the burban is killin me. Fairly inconsistently while accelerating it will start sputtering, hesitating, misfiring and any other way an engine could run bad. I've "looked" for vacuum leaks but came up with nothing but I still need to try the propane torch idea. Is there ANYTHING else that could be causing this? Burb is 91 w/ TBI 350 and 4L80E.