The problem with the dual master cylinder is that the formula I put up earlier is not correct in this case, since the force is (roughly) equally applied to each cylinder, the formula would now be
Pressure / pound force = 4 X P.R. / 3.14159 / D^2 / 2
= 2 X P.R. / 3.14159 / D^2
that is, the force is cut in half. So you'd need a P.R. of at least 2 to get back to what the T.V. does. And of course you might not be able to get a booster in there either.
For the second one, well I actually purchased one myself to check it out. The main problem is that the stroke of 1.31" is very small in comparison to the T.V. stroke of something around 3". So you could easily run out of stroke. Also that master cylinder is not designed for a booster, and adapting one to it is quite a project in itself.
Here's another thread on a related subject:
1953 Manual Brake conversion And this one:
Ford Courier Dual Master BTV replacement (experiment)This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=240854