Welcome to the Forum.
I would repair the bolt holes, line it up, bolt it down, and see if it works.
Then I would use the Jeep as an "Educational Teaching Tool" to help build the character of my young son. I have been in your shoes... still am. Great opportunity for you and your son. Give him a task, and check behind him. Critique him and point out improvements that could be made, if any. If someone had taken that kind of time with me when I was young, I wouldn't have to do everything twice!
BTW- synchro kits are cheap.
Go Fish! <*////><
But the right word at the right time... "Hey, give me a little hug!" That's the difference between lightning and a harmless lightning bug!