Just remember you need to add to your readings when your taking into account these guys that are saying they back out at 1200 are running them pre turbo.....so that would be more like 8-900 on your gauge....
As far a intercoolers go, i personally think for the price to power ratio, its much more cost effective to go with a 6.0 intercooler in your 7.3......Talk to Gcop, Tony put one in his Ex....also Superstroke(bill) put one in his superduty.....