One important consideration is belt traction on the pulleys. An A/C compressor pulls a pretty good load, and the belt needs to wrap around the pulley as far as possible. A short contact patch can result in belt slippage, squeal, and wear under load.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
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