I was in a very similar situation as you just a few months ago. My sitting height was 1/10" above the max as measured by NAMI at NASP. I submitted a request to my flight leader to be remeasured, which was forwarded on to the squadron's flight doc, who submitted it to the skipper, and then to CNATRA. It took a couple of months to get approved. I submitted the original request before I started RI's and the squadron still had to hold my selection for one week so that I could get the approval and be flown out to Pensacola for an "official remeasure" with the civilian at the API building. When I got to Pensacola that day, I wore compression shorts and jumped off a picnic table behind a hangar for 5-10 minutes before I went in for the remeasure. Now I'm good to go for T-45A's (which are more comfortable than the T-34 ever was!)
Keep in mind that the timing was nothing less than ideal and your mileage may vary. Just wanted to let you know that remeasures are possible in primary. Good luck!