Need help with wiring
 

I just bought a 90 gt minus motor trans and ecu. I have a carbed 408 that I'm putting back in it. I need to know will I still have power to all my accessories ie lights, dash, and other stuff even though the ecu is gone.

No, all that stuff is direct wired. No body control module. It should all work.

OK I gutted the stang yeterday of all interior. I noticed were the ecu was in the kick panel there is three plugs there now. How many plugs went to the ecu and also do I need to reconnect any of that wiring. The harness that comes out of the firewall on the pass side is gone. the plugs that are still there go up into the dash. do I need to reconnect those plugs or any of the wiring.

Shouldn't, no.

Hey mattdel do you or anyone else have a under hood wiring diagram. It would make it so much easier to get this 408 in and done.

Well I found a great website for wiring daigrams for 87-93 5.0.
http://sbftech.com/index.php?topic=3993.0