I used classic on a 1965 coronet. I felt the company at the time (3 years ago) was more mopar centric.
Even so, I wound up using a genaric kit because of the poly 318, and they had nothing for early b's.

Fairly straight forward, and I had a pulley issue that they took care of right away.

I did not use the factory controls, chose the electronic air box instead.

I installed it in a convertible, so I probably wouldn't waste my money or time again on it.
But not because it doesn't work. If I keep the top up, it works fine, heat and a/c. Just does nothing for me with the top down.