Engine is easy....you only have a few options T, C, A, or K code, and that is specified right in the VIN or warranty number, 200CI 1V for all T-codes, C-codes and A codes will be 289ci .....2v or 4v for the C codes depending. I believe all A codes were 4v, as were all K codes(K codes in particular should have been the only ones with the HiPo engine). Original paint color is listed on the door tag...in my case it is Y...which is silver blue. trim 22 which states blue w/ blue trim interior(though stripped down it sure looks aqua or torquise to me, and the seats that came out were parchment...guess someone repainted it at some point and swapped in parchment seats) DSO code on mine is 36...which is Louisville(guess thats where it was shipped?) Axle 2(2.83 non-locking) and trans 6(c4-automatic). 65A means it was either a coupe or fastback(not specified...but of course its a coupe)
Door tag decoder:
This site is dedicated to the Classic Ford Mustang, the original Pony Car.
classicponycars.com
In the end though, the ONLY coupes that are worth enough money to be particular about the details are A codes(GTs) or K codes(HiPo engine)....they did after all make a million of the things...literally, which is why its very rare to ever see a coupe sell for more than 20k