5.7 0r 6.1 with msd hemi 6 and carb

OK not to bust your bubble--But we referenced the tdc on number 1 cy. and added timing tape to the crank pulley added spark plug wires to the #1 coil and timed the motor to make sure that the hemi 6 controller was reading timing correctly with a digital timing light and confirmed our readings because the Dyno tuner was beside himself as to the amount of timing that this motor was taking,MSD techs were completely useless to us and told me I had a very inefficient motor!!!! Let me ask you guy's this,If you know about detonation where does this show up first????? Answer---On the Spark plugs correct????? I'm looking for help here--so don't tell me what I don't have Steve