5.7 hemi rough idle and low backfire out exhaust any ideas

Any codes that state Bank one or Two , Sensor "Two" means downstream oxygen sensor (after catalytic converters) Usually The Hotwire setup usually doesn't use post converter O2 sensors because usually catalytic converters aren't usually used in hot rods/swaps.Not sure what you have with your wiring.
If those codes are coming in you may want to call Chris At hotwire and ask him about that to see if those were supposed to be removed in the reprogram, if the pcm is expecting to see those and they aren't there it may be messing up you fuel ratio.If its looking for that rear o2 signal and its not there it could be even be keeping it in open loop.
Also I have never heard of a mass air flow sensor in the stock ecm setup. Chrysler uses a speed density setup with a map sensor , it bolts right into the intake.
White smoke is usually a sign of the engine burning coolant, sometimes if its cold it will appear white when there is nothing wrong until everything warms up.