If some of you are crazy like me then you like to have a clean engine bay. The hardest thing to find has been replacement engine bay decals but I have found a source for them. They are all for 5.0 cars and are accurate except for the radiator emissions decal which has the HO fireing order and spark plug info (which would be ok for people with HO conversions). These are for 87-88 cars
emission decals
1987
http://www.mustangsunlimited.com/itemdy01.asp?T1=DF1115+01&Category=&catkey=74-01
1988
http://www.mustangsunlimited.com/itemdy01.asp?T1=DF2178+01&Category=&catkey=74-01
drive belt decal
http://www.mustangsunlimited.com/itemdy01.asp?T1=DF836+01&Category=&catkey=74-01
a/c decal
http://www.mustangsunlimited.com/itemdy01.asp?T1=DF838+01&Category=&catkey=74-01
coolant decal
http://www.mustangsunlimited.com/itemdy01.asp?T1=DF839+01&Category=&catkey=74-01
Hope this helps:D