If you have an all original numbers matching car with desirable options then straying from original would hurt the value.
I will add that anything at all that is not 100% original will hurt the value. A few things are OK to upgrade as long as you keep the original parts to put back on the car. Anything that permanently alters the car is a big no no.
Car Customization
does it hurt the value of a car if you change the color of a classic car?
1964 Pontiac Catalina
-
Car Customization
CAN YOU TAKE THE NOSE FROM A 1970-73 FIREBIRD AND PLACE IT ON A 1974. THE CARS LOOK THE SAME MINUS THE NOSE.
1974 Pontiac Firebird
-
Car Customization
Putting on a 3" leveling kit and want biggest tire for an 18" rim I can put on without it rubbing
2011 Chevrolet Silverado 1500 LTZ Crew Cab 4WD
-
Car Customization
Can a 1969 Corvette small block 350 engine be installed in a 1985 c4 corvette without any modifications to the body or adapters anyplace ?
1985 Chevrolet Corvette Coupe RWD
-
Car Customization
Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.