Adding Ram Air To Minty 1973 Q Code Convertible

Ok, I think I know the answer already, but still have to ask. I have a minty 1973 triple white Q code convertable with only 9305 on the Odometer and was wondering if adding the Ram Air kit, spoilers and decals would lower the cars value? I also resize the 1973 was not allowed by the EPA for Ford to even offer it on cars with 351C 4V engines.

Basically transforming her from this......



To this......



Thanks for your help
David