The tree of three

When you do get it moving, which I am confident you will. There is no syncro going into first while moving. At least on my 66 A903 there isn't. So its gonna sound horrid if you're not expecting that.
These trannies are bullet proof. My 16 yr old learned to drive a manual on my 66 Valiant. It was more forgiving with his learning to shift than my 99 Wrangler.
Good luck!