Automatic conversion?

I'm sure this will not be the only thing I ask that everyone signs while reading but here goes: my '71 Cuda originally was NOT an automatic but the conversion on making it one was pretty far underway when I got it. I've had a couple people tell me that if I don't convert it back to a manual transmission that I'm devaluing my car to the tune of about $15,000. That sounds ridiculous to me. Mind you, none of these guys own a mopar and they all just rebuild things in their spare time... so I figured I'd ask here and get some other opinions! I would personally enjoy it being an automatic because it's easier for me to drive but if it is going to be seriously detrimental to the car I want to know before I make any decisions! Thanks. :)
Author: IrishMaeve