I don't know what YOUR duster weighs, but I had my white 70 duster on the scales yesterday. It is all steel, full bench seat column shift, nothing removed, has heat wipers ect. Engine is a 410 with edelbrock heads, manual steering, BBP disk brakes, 727 and a 8 3/4 with BBP axles, and weld draglite wheels. It was 3080 with 5 gallons of gas and no driver. And NO to the 11 inch convertor! NO NO NO