You can never have enough sockets or extensions at least. Just so you '64 Galaxie owners know, if you aren't as slim and pliable as you were back in the day you may not be able to squeeze through the hole behind the back seat
. Therefore, it takes roughly 8 to 9 extensions (you may need 1 or 2 from a neighbor), a deep well socket, 2 beers and about 1/2 roll of cheap electrical tape secure it all to successfully remove the 2 bolts that fasten the trunk latch to the deck lid. My preacher clip decided to jump off the lock assembly rendering the trunk lock inoperable.
The other thing you can do is check the condition of the assembly while it still works. I did not find out how common this problem was on the '64's until I joined the club.