Special Instruction Addendums xx969, xx969T KITS – all HDX, Powergrip, Powergrip HD models within this number series Ford Mustang V6 and V8, 1986-up – all HDX, Powergrip, Powergrip HD models xx503, xx772, xx773 KITS – all HDX, Powergrip, Powergrip HD models within this number series
