Connect the vac. line to the top port and get a rubber plug and cap the lower port. As far as adjustment, your really supposed to take the measurement from the old cable and set the new cable before install. However, in changing the cables I have never had to make an adjustment to a new cable.

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'93 300E 3.2
'05 GMC Yukon XL 4x4
'05 Polaris SP500 H.O. LE