engine will only hold oil preassure for ten minutes,  then after another ten minutes it will build preassure again.  cant find the problem.  has tow hitch, vehicle tow package,  would tow a car trailer easily with no brakes on trailer.  350 was gone thru and everything was replaced but the rings and timing gears.  vortec.  ac/radio sporadic.  white w/ grey interior, automatic tranny.  driver seat is torn.  have meterial if interested.  tires arent much good.  paint coming off hood and roofline above windshield.  smoothed rear door.  cargo tie downs along interior walls and 8000 pound tie downs on rear floor.  bout 100k on van