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	In a quest to run 13" wheels on the front to improve the geometry of my front suspension, I have converted some Miata uprights to replace the 2nd gen RX-7 uprights the car was originally built with.
	The modifications to the Miata part are done so the bottom spherical bearing and top rod end in the front a-arms can be retained. The Miata ball joints are not used. First I reamed the tie rod hole and top ball joint hole out to 1/2". They are normally tapered for a ball joint. The largest part of the taper was larger than 1/2" so I welded on 10 mm of 3/4" 0.125 wall DOM on the top of the upright ant the bottom of the tie rod arm. There is then a lot of meat for the 1/2" bolts that will be used to retain the rod ends. For the bottom pickup point I first drilled out the ball joint hole to 3/4". I then took another piece of the 3/4" DOM which is over sized by 4/1000" so it can be pressed into the 3/4" hole. This was welded in and grinded flat on the bottom. I then cut a 62 mm pieced of 1" round bar and drilled and reamed a 1/2" hole in the center. This was welded and gusseted to the bottom of the upright as shown
	Here it is mounted in place.
	From the front
	One other modification to the Miata upright was to cut the caliper mounts off and weld in a custom mount for the Wilwood Dynalite. The mounts came from Urbine Machine. Here is a pic with the rotor and caliper in place.