Push Button heat/ac control module

To keep my pneumo switch from soon failing again, I added a relay that actuates in the "blower high" position. My blower switch (L-M-H) had also melted. I couldn't find a 4-button one for my 65 Newport, so used a 5-button one on a custom bracket and plumbed it so it worked. I posted my drawings on the C-body forum a few years ago. I haven't heard of any non-AC A-bodies having a 4-button one.