VECI label from '86 5.0L EFI
For the label specific to YOUR ~'90-up Ford, click
this link, then click "Quick Guides" in the sidebar, then click "VECI Labels" and find the calibration code on the sticker on your EEC. On '87-91 F-series & Broncos, it's in the driver's kick panel. '92-96 is in the same place, but it's not visible without removing the EEC into the engine compartment. Some '92-96 trucks also have the calibration code on a sticker in the door jamb, but it's hit-or-miss; I haven't found any pattern.
For carburetors, try this:
http://www1.autozone.com/servlet/UiBroker?ForwardPage=az/cds/en_us/0900823d/80/0c/e6/05/0900823d800ce605.jsp 
