NEW 2021 FORD F53 CHASSIS It replaces the old V10 that was there before. The new V8 is a good engine for this heavy motorhome. Chassis choices feature a GVWR range of 16,000 to 26,000 pounds with a wide range of wheelbase options. The 2021 F53 chassis does have a beefier anti-sway bar than previous OEM versions.