I assume you are talking 'alignment' of the pulley. That is important stuff. You can prematurely wear out the belt, put lateral strain on the bearings and cause them to fail. A host of issues can occur.
Here is a good pix/writeup on install a OBA system that MAY be of some help to you. He used the OEM AC unit and got it all installed for less than $100 bucks...http://www.savagesun4x4.com/enter/te...ba_ucando.html
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