Don't think yours is stamped, but earlier years were, on the passenger frame, above front axle. Supposedly on the side of the frame. I guess you have a 1 ton with a driveline Ebrake. You are talking a Ebrake handle, right side of gear shift lever, right? I see some 1 Ton Max Gross Weight plates say 8800. Don't know their WB, don't know what a 1.5T says.
Maybe the long 137 WB came with driveline brake?
