I recently acquired an '87 4runner to replace the rig that I drove daily for 4 years. It came with lots of parts missing-the engine, for instance. The load sensing proportioning valve had also been removed, and after careful consideration I decided to replace it with a manual proportioning valve from Wilwood. I had fabbed a metal bracket from sheet metal, but it didn't quite have the cachet that I was looking for. Since I didn't need the adjuster for the stock lspv, I unbolted it.
The boltholes measure at 25 mm, which is near enough to the 1" spacing of the Wilwood valve to match up.
Drill out a hole in the fender and bolt it in. I enlarged one that held a wiring clip.
The rubber grommet makes for a fine vibration dampener, and there's plenty of clearance with the hood closed.
Disclaimer-I am in no way endorsing any products or modifications. Brakes are important-they help you stop. If you don't know what you are doing, find someone who does-your life could depend on it.