M in the Vin
Red inner fenders (being repoped)
'F' heads (have to check the casting number as some have gotten creative and ground off the bottom leg of an 'E' head.
If it is an Turbo 400-- look at the trans tag and it will be an 'OW'
Look for the Aluminium intake (being repoped)
'W' and 'Z' exhaust manifolds (being repoped)
OAI hood and air cleaner assemblies (you guessed it being repoped)
Manual brakes with 4-speeds and non-air cars (if my memory serves me correct on the A/T no a/c).
This should get you started. PM me if you need some more info.
