I'm looking for some help 1966 Barracuda

Again I agree with C130Chief. Rust is the #1 thing you really have to check for. Also find out if the a/c has been gone through recently, if it is in good working order that's a big plus. Beautiful car, I hope it works out for you.

The power windows, well, that's something you can probably adjust to. Probably a good sign, if someone went to that kind of trouble, they really loved the car.