Paul, you are getting flak because your plan is not well thought out and people see it. You don't even know that the H2 has a 9.5" 14-Bolt semi-floater. The phrase, "junkyard 4.10 elocker cant be beat" also displays that you know something that isn't so. Gears are easy to change and not permanently married to the carrier. The 2008-2009 H2 used 3.73 gears behind the 6L80.
GM's Blacklake XT1 Prerunner uses 6 lug hubs and axles. We use more lugs to haul more weight, not for racing. I have done burnouts in a car with 1 lugnut securing the wheel and didn't break it.
So having said that, if your goals were mine I would look to see if the 9.5" axle for the RWD Escalades and Denalis would accommodate the 8 lug axle shaft with its pressed on reluctor ring. If they are of a different length, I would have Moser make me some custom axles. I would probably do that anyway as I would want c-clip eliminators. I say this without knowing the configuration of the brackets for mounting the H2 differential to a GMT900. Never seen one. I do know that there is a 2.4 inch difference in rear track width between the two.
I would not use the E-Locker but rather an Eaton Limited Slip center section. All that sideways horsing around will soon break even an e-locker. The limited slip can handle it.
I would not bother with the 9.25" front axle. I would use the ZR2 e-locker regardless of its size. It's plenty strong for a pre-runner and horsing around. Most of the time you'll be in 2WD anyway. That's why GM didn't make lockers for them, 99.999% of the time a front locker is not needed, even in racing.
If you insist on the old 9.25", then I would go to Randy's pages where he shows how to adapt one to a GMT900 in multiple configurations, lifted, lowered, regular height. He had custom CV Axles made for it. Even if you keep the 8 lug pattern, I suspect you would need narrower CV Axles for it.
I would keep the 1344 universal joints for the front axle and run 1415 universal joints on the rear axle.
Here are some resources that will help you on your quest:
chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://aamaftermarket.s3.amazonaws.com/resources/pdf/file-20160701132403.pdf
www.demandaam.com
chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://www.gmupfitter.com/wp-content/uploads/2021/05/2004_LD_HummerSUV.pdf
chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://www.gmupfitter.com/wp-content/uploads/2021/07/2013_LD_Util_071713.pdf