My IM with IRS rides level (looking at the side trim strip) and measurement from pavement to the rear fender arch through the center of the wheel is about 21 1/8" (tire pressures 23 front and 28 rear, 195/65x15" tires). My original swing-axle '56 Speedster also rode level.
(Message Edited 8/27/2002 4:30:45 PM)