So I own a 3 ton GM, used it for hauling grain etc. It has a 14 foot dump box, 327 engine and 4 speed Muncie. Problem is it has the hydraulic clutch and master brake cylinder in a combined unit. When I depress the clutch it goes to the floor and stays there until I physically pull it back. I have had it off and apart several times, sent it away to a brake and clutch shop and had it checked out. It worked for awhile but now is back to no clutch. The brake shop said these masters are no longer available which makes sense since most of the other trucks I have found are all manual clutches. Anyone on here run across these critters in their travels? Truck is useless without a clutch other than bump starting it in gear.