Do you need any parts?
I have a 65 monterey marauder 2 dr HT that is complete less enging and trans... hate to send to the Junk heap if someone could use it
Try Crites Restorations, they make headers for this swap, I used their parts for my 65 comet and fit a 410 FE big block in like it was made to be there.
Picture from my projects and some from Dearborn Classic car show in Woodburn Oregon...... Lots of rare iron. and the Burgandy comet Does have a big block 410FE merc done in the old style going to be an A/fx Clone.