I have an idea what I may need to do from reading previous posts, but would like to hear what anyone has to offer. I am having trouble with my new motor backfiring through the carb. I have been able to get it to idle, but when I hit the throttle a little, it backfires and shoots flames out of the secondaries. I have not adjusted the valves yet, have an HEI with stock module, the motor dies and backfires through the carb when I close the choke, and backfires through carb when I give it some gas. Is it as simple as changinh the module and adjusting the valves???