installing AC in my 64 Dart

I would like to install AC in my 64 dart but do not want to install one of the under dash units that hang below the radio. In my research I found that the perfect fit units sold by Classic Air for the later darts will not fit the 64 because the windshield wiper motor is mounted under the dash and is in the way. The later darts the wiper motor is under the hood. It seems to me that I read somewhere that this unit will fit if moved toward the kick panel and inch or so and re drilling the holes to mount the unit. Has anyone heard of doing this. How have other people accomplished this and what units have been used.
I see not issues for the part of the installation under the hood
Any and all help would be appreciated and thanks in advance.
Richard Kennedy