You obviously want to blow a bunch of money on a part you don't actually need; and you're hot to "justify" your decision even though you're torturing logic to do so.
It's your money. The manufacturer and the shipping company thank you for your support.
If you think your application is stressful enough to benefit from that part...you're wildly mistaken. What you need to be concerned about is the "usual" failure points of the 8.5; and the bearing caps aren't really a part of that until you put slicks and a bigger engine on the vehicle.
The best way to "fix" the weak points of the 8.5 is to replace it with a 9.5. And other than needing a conversion U-joint, it can be a bolt-in swap with essentially no fabricating.
It's your money. The manufacturer and the shipping company thank you for your support.
If you think your application is stressful enough to benefit from that part...you're wildly mistaken. What you need to be concerned about is the "usual" failure points of the 8.5; and the bearing caps aren't really a part of that until you put slicks and a bigger engine on the vehicle.
The best way to "fix" the weak points of the 8.5 is to replace it with a 9.5. And other than needing a conversion U-joint, it can be a bolt-in swap with essentially no fabricating.