Go for the new, proper cylinders and lines. The only mod you might make is to put an adapter in to convert from banjo fittings to flare fittings. I found these by accident at NAPA while hunting for fittings for a dual-circuit master that I installed in my 49 3600. Sorry, I don't have the part numbers.
If you are going to change all the lines, it would be a good time to convert to a dual master, or at least amend the line routing to make the change easier when you do.
Current fleet (subject to change w/o notice) \'49 GMC 3/4-Ton , 60 Austin Healey Frog-eye Sprite (some assembly required), 2011 Dodge Avenger, 2015 Jeep Cherokee. No, they don't all run. My other ride is a (B737)no, (B767)no, A320.... Update... was Embraer E190, now Boeing B787. Knowledge is a wonderful thing, but ignorance means you don't know you can't do something.
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