You're going to need a new wiring harness along with that ECU, check out Painless Wiring for that. I found this site a few months ago when I swapped a 5.0L into 98 for a friend of mine SorsCodes WebSite Click on the "5.0L swap" tab and it'll layout everything you'll need to have for the install into your sn95. Since your going to put a 5.0L in, I'm going to assume that you want a lot more power and performance so I recommend that you use solid (metal) motor mounts instead of rubber. It reduce the hp and torque lost through the drive train before it hits the wheels.