Help locating GVWR, etc for 79 K20

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So I've been out searching for some information for a 79 K20 and a 76 K10. The 76 I shouldn't have any problems with as I have the actual vehicle and the Owners Manual at home. But the 79 is giving me problems. I am looking for as much as possible of the information below so I can appropriately judge how much pay load I can carry. I plan on using the 76 to occasionally carry a Truck Camper but I will be utilizing the axles from the K20 (8lug D44 & 14bff) for the additional strength. I will also be upgrading the springs and using overloads or air bags as helpers.

Does anyone know where I can find the information below? As I said, I no longer have the actual 79, just some parts, and no owners manual/door tag. I want to stay as close to GVWR and GCWR as possible when sizing a TC.

Thanks in advance.


GVW: Gross Vehicle Weight - the actual weight of a vehicle.

GVWR: Gross Vehicle Weight Rating: The maximum allowed GVW for a vehicle.

GCW: Gross Combined Weight: The total weight of everything - tow vehicle, trailer, etc.

GCWR: The maximum allowed GCW.

GAW (front or rear): The Gross Axle Weight - the amount of weight on that particular axle.

GAWR (front or rear): The Gross Axle Weight Rating: The maximum allowed GAW.