Hey JDH, I'll check but I think I just ordered a new '67 master cylinder & bolted it right in. From what I know, with the stock drums on all 4 wheels no proportioning valve is needed, that's only if you go with half disk half drum.
The brake line plumbing was odd in comparison from what I've seen on other vehicles. There was a tee on the right side where the rear line & right wheel came together then ran over to another tee on the left side where that line & the left wheel came together and ran up to the master.
I put a coupler on the rear line & extended it to the master cylinder. I added another coupler to extend the right front line to the left front into a tee and up to the master cylinder. Bench bled the master before putting it on and then bled the systems and it is awesome now.
Truthfully, the most pain in the butt part was getting fittings to run the stock 3/16" lines into the master cylinder.
https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1
https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1
These were the two fittings I used, cheaper, easier, & quicker from Amazon than anyone else. Let me know if you have any other questions...