Hy ArfelMcFarfel, your left wheel cylinder is Raybestos p/n WC37025 $9.27 at RockAuto, at Napa the p/n is UP37025 $13.23. In your picture it looks like both your brake shoes have the same amount of lining on them, are all of your brake shoes the same? Most of the brake shoes I've installed on trucks as new as yours had a primary shoe (shorter lining), and a secondary shoe.
