I am still having nightmares on this one ...
I a$$-u-me you have bought CHI-COM SLOPPY COPIES (metric bleeding screw) to replace hopefully what were OEM cylinders (may be hard to determine after all of these years).
When you look at the take-offs, do you see any markings as to possibly ID them, i.e. FORD and/or BENDIX ID?
IMO ...
With a car this old and considering what is out there to service one properly, it might be a consideration to have the cylinders remanufactured, i.e. SS sleeving and
quality wheel cyl kits w/ cup expanders.
If one went about it in this fashion with frequent fluid changes, the chances of a future failure would be nil.
Same with the MC.
DO NOT sh!tcan!
Do the replacement cylinders look like anything that came off (and there is no guarantee what was on there before)?
Now one more point to b!tch about ...
If one has the original brake drum w/ the adjustment slot, if one has it relined instead of replacing it with an off-shore might fit, you will be able to retain the original adjustment procedures for that period brake design.