Looking for master cylinder suggestions on somewhat unique setup

Nice find. Top ports (some) and reservoir can be relocated. Inverted flare fittings w/ 10mm x 1 threads, but likely can source matching tube nuts for standard 1/8" tubing. Looks like available in 7/8" or 15/16"D bores, good for manual brakes (see Centric) 4-bolt mount but doesn't list hole spacings. Great if matched old Mopar. Do you know?

I just cut the flare off, slip a Metric on and reflare .
Bolt pattern is smaller, haven't tried it on a Mopar, I have made a adapter plate for a racecar app.
There is also a 2 bolt , which may be more easily adapted .
I'll try and find an alum, there is vast variety .