Classic Auto Air AC- things to look for

Thanks guys. I have been looking to put A/C in my 63 Belvedere that has a 1970 small block. I have been looking at several vendors.
Right now no one makes a kit for such a animal so I may have to do piece mill.
I have sent a e mail into Old Air Products looking at what they have should fit the bill.
Just wanted to get a "Yep it will work" from them before I order.
This was 8 days ago. I'm sure I won't get a response. "Contact us" never seems to go anywhere.I will wait and send another. If not then they will be getting a call.