1965 mustang coupe--original color silver smoke grey.now painted yellow---needs paint and bucket seats upolstered.how important value wise is it to keep exterior paint and upolstery the same as the numbers called for How popular a color was silver smoke grey and would you upgrade from the standard black interior to the pony interior.Also is there any site where you can look up how many 65 coupes we're painted a certain factoy color?Which color in 65 do you think was the most popular?THANKS