[Bleyseng]

The only sure way is too calibrate the MPS on a chassis dyno doing multiple runs to sync in the Part load and WOT settings to the proper Air/ Fuel ratios for that engine.
It is amazing how well the engine will run when this is done. Brad Anders settings are for totally stock engines, using stock parts to get you back to the Factory settings without doing the Dyno work.

Using a MPS that leaks will cause some problems find one that is good and calibrate it to your engine. You would rejet the carbs if you were running em right?
Geoff