I'm not sure what you mean by "back". To me back means to the back of the car, and if you moved it back the compressor pulley would be misaligned.

And if you moved it laterally, in other words away from the drivers side, you would need 1-1/2" of washers to clear the fan blades.

Do you have a pic you could post ?

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1974 280C MBZ
1995 BMW 840 Ci
1999 996 Cabriolet Porsche
2005 Toyota 4Runner
1974 VW Westfalia camper P27