Unless your motor can suck enough air to 'peg' the MAF, the tuner will take care of it. You just need the MAF curve for that sampling tube to put into the tuner file.
I ran a 36# tube and 48# injectors in mine for quite a while. I recently added a few more mods and now I peg the meter @5V around 4200rpm. So I ordered a 50# tube to lower the voltage output and keep it in range.
If you plan on really going balls out, then think about a different MAF tube. But, I don't think it will be necessary.
Later,
Steve