Maf
Thanks in advance
Which MAF you using, I'd recommend a screen before it as well, smooths airflow (Hz reading) seen this first hand.
To answer your question, the MAF should be near the end of the longest straight section of intake track you have. This allows air to flow through it in a linear fashion which will give the most accurate and consistent results. If you notice where the OEM's place them you will see what I mean. The MAF is rarely coming off a bend and if it does the bend is as gradual as possible.
Post some pictures of your project in the conversions section, we'd love to see it.



