Heater box for A bodies.

Also, check out Detroit Muscle they make a lot of good heater & ac rebuild stuff. They also have high quality dash wood grain and other inserts. You may be able to rebuild your box. I would rebuild any used box I put in anyway. I think I have seen a rebuilt one for sale on this site.

On the ac rally dashes, I have a 67 rally dash in my 69 cuda with a 71 dart ac, so it is really a Frankenstein. I had to fabricate a pretty simple angle bracket to get the ac vacuum switch to mount. I have no actual experience with swapping controls on a non ac dash, but the ac control swap was pretty easy.