uhhh.... tune from where? you didnt tell us where you ordered the tune from?
on a side note, just wait until you get your mods installed. you will have a whooole new animal on your hands. you're going to love it. HUGE difference from stock boost.
edit: i see/saw lfp....but that isnt where you ordered the TUNE from is it? (i didnt even know/think they did tunes. are you sure the tuner doesnt come with just canned tunes, or did you have to tell them your mods, and ecu code and THEN they wrote you the tune?)
might want to check with them, and make sure the tune they send you will work with your 2.7 pulley/more than stock boost. as long as it will, then you should be fine. there are chances of pegging your maf, and your fuel pumps, but each car is different, so cant really tell you for sure. i know that i personally am running a 2.8 upper, and did not need a maf, or a boost-a-pump...although my fuel system is REAL close to maxed from about 5.2k up.