In a message dated 11/24/2010 2:09:03 P.M. Pacific Standard Time, dpleau at wavecable.com writes: Remember it comes with that $500 alternator conversion. dp Maybe it needs that to power the compressor for the air suspension - I don't know this! < very true! Seth Emerson C's the Day! - Corvair, Camaro, Corvette San Jose, CA