Need some electrical help with my ‘68 Plymouth Valiant 100

Your getting excellent advice, AND although you should attack one issue at a time, you mentioned your intake was leaking, where? Are you sure it isn't the thermostat housing on top of the intake ( under the upper rad hose) that is leaking? It is a common issue on those motors and an easy fix, that being said it should move low on the priority list AFTER the leaking brake fluid, after the charging and before you drive it again.
So the red arrows are showing where the leak is coming from. I wish I could record it to show a video but it is bubbling out from that crack. The blue arrows are just pointing out some of the leakage that can be seen. Is this where the thermostat housing is? I don’t really know where that is located.

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