LS Truck Alternator Bracket Low Mount LSX LS1 LS2 LS3 F Body Alternator Bracket Low Mount LS Alternator bracket for Truck belt spacing Does not include rear alternator brace, idler pulley, or belt Can only be used on blocks with at least 2 mounting holes.. If you have a block with only 1 M10 hole you will need to drill and tap the 2nd hole M10-1.5MM. To complete this kit you will need a 1998-2002 factory ls1 Camaro tensioner pulley, and a 6 rib belt K060551 55.125 long. If using a 145 or 160 amp truck alternator a 3/4 inch longer belt will be required.