My 66 Plymouth shop manual calls out 2 lbs 10 oz tp 2 lbs 14 oz. If you need any other info on this car, e-mail flturbo6 @[...] or call [...]. I own a 64 Valiant, a 65 Valiant, a 66 Valiant, and a 66 Cuda, and have the factory part and service manual. Login to read more.