After Christmas I started the chop on my 54. The plan 1.5 inches, sedan roof,hardtop catwalk, sedan decklid, roof about 9.5 in. longer, hardtop A pillar & vent window. So here are some progress pics. After removing the roof, package tray an trunk jam it was time for some wheel wells. (large C notch). Then starting by positioning the hardtop jam an hinge then adding the sedan corners. Then set the roof on an 2 in. out of the back, lay the rear window forward a little, tack into place. So far so good.