Great thread, I admire the efforts to make the SPID as close to original as possible - let’s just say that’s refreshing in light of all the new Cheyenne Supers suddenly floating around on Barrett Jackson. Nice to see someone keeping it very original. Having said that, have you considered swapping in a
dual res master cylinder? Great safety upgrade and a 67 C10 mc looks right at home - unless doing a 1000 pt resto it might be an option to consider. You can do it without adding a power booster and only bending a few new lines. I mention only because it looks like you just installed a new single pot mc, which of course would be correct, but right now with the engine out is a convenient time to get to the few new lines you’d need very easily.