Is this rare at all?

[redogre]

hey, this is my first post on here (awesome website btw), anyway i recently bought a 1971 c10 that is almost 100%stock the only aftermarket part is a rv camshaft. its a factory big block with factory ac, power steering, power brakes and posi. i was considering changing the motor but then i thought maybe its worth more leaving it stock and selling it and buying a different one. i figured if anyone would know it would be you guys!
thanks a ton, redogre.