gm 12 bolt question

[biggsteve97]

I have a Gm 12 bolt in my custom built Chevy half ton. It has 3.73 gears and an Auburn pro series limited slip. It has served me well despite the severe abuse it has been through and still no problems. I built this truck for hauling and have had on average 5,000 lbs of dirt or gravel in the bed. It has seen over 7,000 lbs of stone before and I am surprised it survived especially since I was on the highway going 55mph for most of that trip. Truck was stable but I was very leary about the rear end. I have extra capacity springs and stronger custom crossmembers to support the frame. My question is, Where can I find the specifications for load capactiy and torque input limits for this axle. I am trying to determine if I should continue to use the 12 bolt or finish the build up of the 14 bolt full floater and swap them and use the 12 bolt in the big block blazer.