Power Valve Selection: The Definitive Answer

I will never understand all of the info in the previous 4 pages. Changing power valves from one extreme to another have done nothing for my six pack. 10 ins of vac at idle, 19 at 2500 rpm driving 55mph. Promax rear throttle plate, have tried both the factory metering plates and the ProMax replacements. Found one big mistake that I had made with the ProMax replacements, which started two more problems, start over. I believe that my phasing is off too, stock type mopar dist with FBO module. Testing last nite, engine is backfiring under wot now, and all that I had changed were the vac pod springs. So that is new.
It gets tiring when you think that you know or understand what is happening, but I don't, and I am not totally new to this. I haven't quit, but I am getting tired, and I didn't really want to go 4 barrell or FI TECH injection. I will continue to read and test, keep up with your results!