Just wanted to confirm, the firewall/evaporator box for GM A-bodies should all interchange from 1968-72, correct? Just want to make sure I'm doing a proper search for these before I go ahead and buy one for the '68.

 

I know the 1968-72 Olds A-body are all the same. I've been told the other A-bodies will interchange but haven't actually compared them so someone else will have to chime in on that. John