With a 3,200-pound shipping weight, the Drag Pak weighs about 1,000 pounds less than a standard production Challenger R/T. To save weight, the standard door glass is replaced with 3⁄16 thick clear polycarbonate plastic replicas. Supplied by Shields, they’re treated with Supercoat to resist scratches. Contrary to reports stating the Drag Paks are delivered with the windows in the retracted position, Papa’s car was delivered with both windows fully raised. Previous ’65 and ’68 Race Hemi package cars used breakage-prone Chemcor lightweight door glass.