Biggin69 What a beauty,are you using brake fluid ?? If so left front may be leaky also sounds like adjusting is in your future. should end up with a good half pedal so your cylinders are moving they're cups to keep them in good shape. On trucks that set a lot I put silicon grease (ignition grease) on the brake pistons so they don't set-up so bad. Caution don't try to use bearing grease,will create a nightmare !!