Universal or Cal'd for 42's MAF?

Which is better?

A Universal MAF mounted where i can bring it to my sct tuner

OR a pro-n MAF that is cal'd for 42's?

or a Lightning maf that would need to be programmed also?

I read something that said when they cal' a maf to larger injectors it messes up all the load scaling in the computer?

Has anyone run one with out any problems, a 42' lb cal'd MAF?

oh btw, this is for my next project a single turbo.

LAstly, should i go blow through or suck through? The universal one says it can go eaither, or i can but a cal'd for 42's that is both ways.

whell it will be a single turbo....so i could put the MAF before the turbo as a draw through....just, i dont know what would be the best.