Post or Non-Post Cars?

Hey all,
New guy here. I didnt post in the welcome wagon first, but dont hate me. Im from California, and have grown up around Mopars all my life. My family has always been into drag racing, and currently we travel as a family, helping my uncle with his 7 second car.
Anyways, my younger brother recently turned 15. He's now looking for a car and wants an A-body. Preferably a 67-69 Dart. I found a 68 Dart locally, thats not a bad car, but is a /6 car so it has drum brakes, small rearend, etc. I got the guy from $1500, to $900, and its a running driving car, with one small rust area on the right rear lower quarter. We have a fresh 318 sitting on an engine stand at the house.
The only issue my father brought up(who is the Mopar guy in the family), is the fact that its a post car. My brother says this doesnt bother him, but I dont want him to buy it and then not like it later on.
So...my question to everyone is...whats your opinion on a post vs. non-post car? Maybe I can see what others think, and make a better educated decision. Any and all input is greatly appreciated!
Thanks in advance and Happy New Year!

Kyle Curley