The master cylinder has to be in the right spot for the rod to line up and the required supports to go in the bolt holes. I’m not talking about the hole through the firewall, all three dimples are above that in your photo. The middle one is barely visable.
I have 3 legs for the LWS gun ring setup for m939 series trucks. 2 of them have mounting brackets. You would need 1 more leg to complete the set. $150 for the 3. Cash upon pickup in Colchester, VT. Sorry I don't want to ship.
The wires are probably for the 4-wheel drive light as the CUCVs didn’t come with the light bulb for the indicator. I have a later 80s/ early 90s shift knob from a Chevy truck with the indicator button from a early 90s Dodge Ram.
I would make sure even if someone says it’s out of an 85 or newer that it really is a hydraulic clutch setup as it’s not uncommon for things to be swapped around. I just bought a 79 that had been swapped to hydraulic clutch.
The pin the brake rod attaches to is in a different spot so the easiest thing to do is just put the hydroboost brake pedal onto the manual transmission pedal assembly and cut the foot pad down like posted earlier in the thread, but you could modify a vacuum pedal as well.
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