Pinging dsags!!!
Added Vintage Air to a 65 Special. One catch, it has an LS engine in it, so the compressor mounting part of it is different than stock. Have heard of some who install the Pontiac Lemans\GTO kit, but I found it better to pick and chose from their Builder Series.
Followed the lead of Roger Sears’ installation and ran the hoses behind the inner fender for a cleaner look but that isn’t necessary. If the car has no air currently the best bet is to go with a complete air, heat & defrost unit. The best unit they have is called Gen IV. It has computerized operation, etc. BUT, the unit may not fit under your dash. They do sell Mock-Up units for $50-60. They are hollow plastic units so you can size them and only weigh about 3lbs.
The Vintage Air site has dimensions for the various units - GenIV, Compact, Mini and Super GenII.
My install started with the dimensions which led me to ordering a Compact GenII mock-up. Then the fun began. You have to take out the current heater to test fit the mock-up. On a 65 this is accomplished by removing all the bolts from the inner fender and sliding it forward. This gives you access to ‘all’ the bolts on the heater. There is much more to the job (recommend removing the passengers seat) but this is a start.
There are other consideration later such as the hose kit to buy (I have an AC line crimping tool set I can loan out) but the first step is to get the correct unit.
Purchased all of my install stuff from Summit Racing. Used the Vintage Air site just for finding the parts wanted. Can’t post pictures of my install as the are in the wrong format. But PM me and will email them.
Dan