I have pyros installed in the pipes 1 foot before and after intercooler. With the Banks unit air would go in anywhere between 110* and 500* and come out anywhere from 10* above outside air to 180*. For 95 percent of my driving it went in around 160* and came out usually 10*- 20* above outside air. I was suprised how quickly the needle climbed on the inlet side with every pound of boost made. I could easily bury the needle (450+) on the inlet side with full throttle and 28+ pounds of boost. The outlet side needle moves slowly all the time. Only by running it down the 1/4 mile could I get it above 150*.
No readings for a stock cooler sorry, but, unless your making more than 300 hp (IMHO) I think it would be fine. With the Banks unit maybe up to 400 hp.
Banks cooler is same size width and height but is 2. 25" thick compared to 1. 75" stock.
My new Joe Hellmann intercooler is sweet! It has fins in the little core rows even! It is about 3" taller, same width and 3" thick. He custom made it for me and he said he can make more.

I had him make it with 3. 5" inlet and outlets to match my 3. 5" inlet of my 3rd gen Banks intake horn. If I did it again I would stick with 3" inlet, outlets and intake horn. Many more options for intakes with 3", more room to install the intercooler through radiator support and you can find shops to bend 3" pipe. It fits intercooled trucks even with a/c. A little modification required but not bad.
Inlet temps cannot get to 450* until I'm right to the end of the track. Climbs slower too. Outlet side is usually 5* over outside air. Run it hard down the track, it has yet to exceed 130*. The needle moves so little I wonder if it's working sometimes (I've checked; it works fine).
I sold my Banks intercooler quickly for $400 ($900 new). Joes is around $1000. Get a few of you guys together, maybe less.
From what I undestand Piers intercooler is same dimesions as stock; just better cooling.
Sorry it's long; just trying to answer questions that may arise.
Kurt