What you heard is right, the 94-95's are sensative to cam swaps and hence don't like to idle afterward. I have AFR 165 heads, FTI custom cam, edelbrock intake, etc. in my 95 GT convertible. After the install, the idle would surge and stall sometimes, but upping the FP made it worse, so bad in fact it would load up and stall all the time. I went and bought a EEC-Tuner from shiftmaster enterprises. This fixed my idle problems as well as a lot of other things too. It also bested my 1/4 times from 13.2 at 105 to 12.9 at 106.85, and it has the same drivability now as it did when stock.
http://www.eec-tuner.com
------------------
1995 NA GT CONVERTIBLE
BEST ET: 12.92
BEST MPH: 106.85
AFR's, FTI cam, edelbrock intake, EEC TUNER and lots more.
http://www.angelfire.com/pa2/killercanary