Hire it done. Easier on your body and emotions. Not to mention you'll enjoy it more. 

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I installed the VintageAir system on my '75 a few years ago -- it was a challenge but I did get through it.  I was in my '70s and not a small man, so crawling around under the dash was a bit stressful.

As you probably know, there are a lot of pieces that need to be brought together, and it did seem a bit overwhelming at times.  But their instructions are very good, and their phone support is great.

Best of luck! 

Thanks

You certainly get my good wishes!    Hope it goes well.👍

In fact, I'll be interested to hear how it does go - I read recently that people swap their stock system for a Vintage Air set-up, which are supposed to be better?    

That said, at 72 I'm not sure I want to get into that swap!😱

Thank you , I’ll post some pictures of my progress 

Good luck my friend. Me too going through interior work. I had seats redone over a year ago and well, it's still not ready to install them. Crawling around inside the cabin ain't what it used to be. It's been excruciating hot this summer and I could not find any good days to fold myself up and install the rear underlayment, interior carpet, 3 door assembly, etc.

As for the air, I would think at this point farm it out. I know how enticing it is to browse through catalogs and buy stuff for cool projects.....

Bruce
72 Coupe L48 4sp
Custom Blue/Silver/Pearl

(Click for a larger pic)

One thing about the VintageAir is that it eliminates the outside air duct, which means it is always recirculating the inside air.  I was getting a lot of hot air intrusion in the summer (I assume from the vent doors not sealing completely) so this was eliminated with the new setup.

I run my factory air in Max/recirc 100% of the time.  It's the only a/c setting to use.

Good luck to you I have a 1973 454 4 speed I changed it over to fuel injection and electric headlight motors  did it myself I’m 84 years young

I put Vintage Air in my '76. I had to modify one of the hard vent connections to make them fit together. I called customer service twice with wiring questions and they were quick to help. I have a dozen pics or so of the install if you are interested. Cramming the flex tubes and wiring behind the gauge cluster was tough. 

I wasn't able to get the hard duct that goes across the steering column in place, so I just left the ducts open.  That worked fine.

I also wasn't able to get the ducts above the center gauge cluster in place.  It was just too tight in behind there.