From my experience with mine, I still expect you'll find the IFRs too small. You can test your idle circuit by temporarily putting small wires in the idle air bleeds, which will richen your transition circuit. ***Make sure you secure the wire so it doesn't get sucked into the carb*** If it runs better, then you know you need a richer idle circuit.
If it's just off idle that you have your problem, a new power valve probably won't help, nor will a different pump cam (this is only from my experience: your results may vary). :)
