Been through all that w/ attempting to track down a '64 262 Inliner for over four (4) years now.
Got stiffed on three (3) supposed 262's, turned out to be '64 223's, & when I did finally find a real '64 262 It was so badly Siezed w/ Rust they are still soaking it to try & get it apart.
So when JMS came up w/ the 300 block for building I jumped on it, it was after all the first thought I had on doing the rebuild on.

Cheers
Colonel Flashman