I was a bit surprised to see it has a 3 speed manual tranny and no A/C, considering the other options it came with. Regardless, a nice looking set of options.he had done years ago.
Both of our 73 Mustangs (Convertible andMach 1) were non-A/C. One had 4 wheel drum brakes. The prior owner of the Mach 1 found another 73 Mustang with PDB in a bone yard, and swapped out the Master Cylinder, booster, and related/needed disc brake parts. I recently had occasion replace the rotors and pads (part of a larger repair that had a damaged rotor). The conversion was done so well that I saw not one single flaw in the work previously done. Both Mustangs were originally npn-A/C cars. We installed Classic Air complete A/C kits to both - highly recommended. Neither car had tinted glass from the factory, so I had 15% (very light) tint film put onto the side and rear windows. I would have liked to a deeper tint., but in NY law enforcement officers have tapped into the lucrative market of handing out tickets for "excessive tint, and in the Rochester area they got tired of losing in court, so now many carry tint level measuring tools, write their tint level findings on the citation. The maximum tent allowed is 30%, so by going 15% I anticipate not having any issues. At least nothing I can't defeat in court.
Finally, in the Mach 1 the prior owner replaced the original 2.79:1 rear axle gear set with a much more lively 3.5:1 TractionLok set of gears. The result, with a street/strip built engine, was a very spirited pony car. But, the engine RPM in third gear (C4 auto) was 2,750 at 60 MPH. Not bad, but I wanted a calmer cruising experience, without losing bottom end performance. We ended up transplanting an AOD, with its 0.67:1 OverDrive ratio output in 4th gear. We now have the best of both worlds - a strong launch off the line, a terrific cruising experience at around 2,800 RPM at 60 MPH (very nice), and a nice top end performance experience as the built engine deals with air resistance at high speeds very nicely.