casting number
 

have a 302 casting # d4de8016aa also # 3l28 can anyone tell me what it is ?

Re: casting number
 

d4 - 1974
d - Maverick (1970-74)
e - engine
8016 - 8000-8499 = Radiator and grille
aa - Single letter indicates specific application. Increases alphabetically (A, B, C, etc.) for each minor revision (same prefix and basic part number) and then double letters (AA, AB, AC, etc.) when all single letters are used.

3l28 could be a date code - November 28, 1973

not sure if these are correct maybe someone else can check them over.