Dave Z & S Beaudry
If you want a complete rundown go to
http://www.jason.fletcher.net/ or Fletch's Carburated 5.0 Mustangs this is where I got all kinds of useful info on converting my '89 GT efi donor motor to carb. using a 600cfm Holley etc. worked great right out of the box.
mannyjoe
or if you need more info you can e-mail me at
mannyjoe@aol.com