Possibly trading for a '65 Barracuda

Go for it !!!! Ditto what 66fyssh said... Peeps love talking / asking about the early Barracuda!
As for the 904... They are very easy to rebuild if you have mechanical skills, the tools & a shop manual... I did many of them in my day... 727s included... Just lay out the parts in the order of disassembly... (Just a suggestion on that last part) ⚓