Jim, did you get some photos of the 2004 Chevy crew cab dually with twin screw rear axles (8 tires)? Not sure what engine it had, but said Spectra Performance on the ID card. Had an extended bed and was lowered not raised like 80% of the trucks at the show. Nice looking set up I thought.
83 C10 Suburban, Silverado, 6.2, 700R4, 3.73, 31-10.50R15
82 C30 Crew Cab dually, 6.2, Banks, Th400, 4.10, Gear Vendors, 235-85R16
83 C20 Suburban, Sierra Classic, 6.2, 700R4, 4.10, custom paint, 285-50R20
95 Yukon, 6.5, 4L80E, 3.42, 265-50R20
73 GMC Astro 95, 8V71, 10 speed Roadranger, 110" WB, 6 each 11R24.5