You need not worry about your 65 Cudas value when changing the above mentioned items! The value is in your enjoyment of the car, not in the monetary value! That's the best thing about early A bodies, they're cheap to buy and build, don't have to worry about value, and oh, did I mention they're fun as heck to drive??? Go, enjoy that car, and take it from that great philosopher and thinker of thoughts the Burger King and "Have it Your Way"!!!!
