Here is one issue with using an older distributor in a later 235. Depending on the distributor, it may have a cam gear for a steel camshaft and will not be all that workable on a cast camshaft like the 62 has. Also, depending on the year, it uses a different rotor and point set, and may have a different timing curve. I have a Delco Remy book at home that lays out the curves for various series of distributors. The distributor you want to use ends in 2403. this was the part number used from 56-63, and according to my Delco book, was the designated replacement distributor, even for the early units.
