Pro Flo 4 Timing

I tested it with +5 degrees and it ran better at idle, but when stepping on the gas at higher RPM it felt silght hesitation, I changed it to -5 and it ran like crap, so ended up adding just +2 degrees and ran better at idle and no more hesitation at high rpm full gas.

Has anyone added a ignition box to improve spark overall?. There is usually people that awear the engine improved a lot and others say dont waste your money if you have a good stock system its good for any normal/hot street application.

I have only an MSD blaster 2 coil driven directly by the edelbrock ECU. would be interesting to learn what others are using and the results are.