Start researching before you buy stuff or you'll waste tons of money.
The pro m sensor should be calibrated for either 19 or 24 lb injectors, not both. Mine has the calibration on the top engraved in the plastic. The most important thing is that it is calibrated for the size injectors you have. Secondly, don't make the mistake of putting a Pro M sensor on a C & L MAF tube because they aren't interchangeable.
Lastly, I'm no expert, but I'd say the 80mm MAF tube might be a little big for your combo. You might not make as much power as you would with a smaller one, but I'm not sure what else it would cause.
What size injectors do you have?