Are you having trouble with your brakes? If not, why mess with a good thing?
You obviously have a 76 or 77 bronco, with factory disc brakes. That valve has multiple functions that are, every one, quite desirable.
You can certainly bypass it, but nobody in their right mind does it unless they’re replacing it with something of equal or greater effectiveness, I wouldn’t think.
I believe one of our MOAB kits (for 75 and earlier models) included a bracket and adapters, to eliminate the old H-block. But it was only included with a full braking system, including alternative, updated proportioning, or combination valves.
I’m also pretty sure we would never sell it separately, for safety, reliability, and lawsuit reasons!
And frankly, even with a fully altered brake system, leaving the old distribution block in place, simplifies plumbing.
Your combination valve is different from the old, simple pressure differential valve, but the concept could be the same.
What issues are you having with it currently? If it’s malfunctioning, you can also rebuild your own with parts available from the aftermarket.
There is a company that sells kits for the different manufacturers versions. We’ve had writeups on it here, and on other forums.