Smart move keeping the IMRCs, only a blower like mine would work better without them...... hence, why I dont have any anymore.

But the IMRCs will help while the Vortech is spooling.
6 psi is right for the base Vortech kit and I wouldnt run much more then that without the intercooler setup. You really should hook that up.
Let me put this into perspective. My Cobra would see 110* intake temps when it was 95*+ out and would go as high as 140* under full boost. When I upgraded the coolant tank and heat exchanger the IATs never went above 130*.
Now with no intercooler I see 130* IAT when its 100*ish outside and after a 1/4 mile at full boost my IATs hold at 220*

!!
When I did a speed run I saw 230* at the end of 3/4 mile and while the car was still going like a raped ape I got out of it for fear of making it go KA-BOOM!!!
I need a meth kit so bad. Gonna save up over winter since pretty soon it will be cool enough out to have a mother nature intercooler.
Anywho, install teh intercooler. I realize what a PITA it will be but if I could have a regular one I would carve up the nose to make it fit. ..... ........ bring it by! Ill install it for ya!