use an empty deodorant pump (non-aerosol), do a few tests and just thin the paint to suit.
then carefully spray between each opening, wipe up any dribbles with a rag as you go.
was there much work in fitting the early mc, do the linkages line up? I pinched the whole W5 set up of a wreck on the weekend. so I can do either, any reason you chose the full swap?
nice work man, I'm also in the process of linkpining a '71, are you going to run power assisted drums, or put an earlier master cylinder in? also got any more pics of the finished notches, and torsion narrowing?