69 Mustang A/C on a 66 Mustang?

[Fredo]

Will the A/C system off a 69 Mustang 302 fit on my 66 Mustang with a 302?

 

[rbohm]

it will with some firewall modification. if you look where the a/c unit goes you will see the 66 firewall bump out is shorter than the 69. cut out that area of the 69 firewall and weld it in the 66.

 

[GaPonyFarm]

Seems to me that they are totally different systems. Is the 69 factory air or an aftermarket add-on? The compressor should work, brackets will be different. The condensor and evaporator will be different, but aren't especially expensive.. Inside the car, is where you'll find problems.