is it original engine? a numbers match car? If so, at least save what you take out ,to sell w car at some point...if its not matching no`s car it wont matter much... just make it the way you want it...its your car, for you to enjoy...if you bought it to make money....forget it... yes if numbers match its worth more in the long run as is...but nothing stops you from switching it out and keeping the engine and tranny you take out...as long as you have them "with" the car..
