If I am reading the leakdown test results in your pictures correctly cylinder 1 is the most significant problem and the one noted to have a leak into the intake system. Cylinder #6 is marginal. Before you tear the whole thing down check the #1 intake valve to ensure it has lash (maybe adjust to have exccess lash). Just because you have some leakage past the rings doesn't mean the engine needs to be torn down.

Cylinders #4 and #5 results look strangely high pressure (low leakage)?

1949/50 3600 Project
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