the 55 manual says the standard trans models got solids, the powerglide models got hydraulics with a different cam [higher hp], but by 57, the car shop manual says "one six cylinder engine is provided for all passenger models and types of transmissions ..... All six cylinder engines are equipped with hydraulic valve lifters and high lift camshafts to provide better performance ...." the 57 manual has no instruction for adjusting solids
Bill
