Weighed the Alpha again, this time without the Thor Gen2 bumper and 12k Badlands winch so that I could get some good comparisons.
W/ Thor bumper/winch, full tank of gas, no cargo/passengers
Front: 2,800 lbs
Rear: 2,520 lbs
Total: 5,320 lbs
W/O Thor bumper/winch, full tank of gas, no cargo/passengers:
Front: 2,560 lbs
Rear: 2,580 lbs
Total: 5,140 lbs
And for interest:
W/ Thor bumper/winch, full tank of gas, no cargo, 1 driver
Front: 2,940 lbs
Rear: 2,620 lbs
Total: 5,560 lbs
W/O Thor bumper/winch, full tank of gas, no cargo/passengers and me hanging my fat butt on the rear bumper:
Front: 2,460 lbs
Rear: 2,900 lbs
Total: 5,360 lbs
Stock ratings:
Front GAWR: 3,050 lbs
Rear GAWR: 3,500 lbs
Total GVWR: 6,001 lbs
So the Thor bumper w/winch weighs ~180 pounds according to the CAT scale. Obviously there is some rounding there since it was designed to weigh thousands of pounds so there is a little bit of resolution error. For example, I weigh almost 240 pounds, but the difference between the first weigh without me and the second weigh with me is only 220 pounds. So there is clearly some error margin there (about 0.2% which seems pretty darn accurate for something like this), part of which could be attributed to it being a different day and temperature. At any rate it's close enough for figuring. I weighed the bumper/winch on my bathroom scale however and it came up to 187 pounds. Which in any case is far less than I was expecting.
Another interesting thing I learned is that it is not as simple as "for every foot away from the axle weight transfer is 2x the weight being added." While that is true for a simple fulcrum and lever, it clearly is not that simple when dealing with a vehicle. Instead of that, I only saw a weight transfer of ~60 pounds from the rear axle to the front axle due to the weight of my bumper hanging off the front of the truck. So the total weight added to the front axle by simply adding the bumper and winch came out to a total increase of about 240 pounds, give or take 20 pounds. It's also apparent from the measurement when I stood on my rear bumper, only ~100 pounds transferred to the rear from the front axle. So the front bumper was a 33% increase on the front axle due to weight transfer, while the rear was 42%.
So while empty of cargo the front axle with me in the truck was almost to the GAWR of 3,050 lbs, once I start loading up the rear with cargo that is going to shift a little, plus it likely won't add as much to the front overall. I will re-weigh though once I have a standard load in the back to see where I end up at. I might be over the front GAWR afterwards but we'll see by how much.