Frankenboost, My gt35 isnt a ordinary 35R. I had the HTA86mm (big not the smaller HTA82mm) conversion done to it which now lives a 75lb/min wheel instead of the 62-65lb/min wheel (couldnt remember which was stock).
So in retrospect this thing should breath just fine up top, but I think my hold up will be the T31 .82 exhuast housing. I believe most of the gt37's use a t4 housing and breathing out isnt a problem.
Hopefully Tim will be tuning it, I may have to find him and wrestle him to the ground to do it, or he will probably just beat me a and walk away. Either way he has only done the best for me with my previous tune so I hope I can wait for him again. LOL Dude probably needs a vacation (I havent talked to him but sounds like he never stops).