[Herb Concord Ca]

Model A29, your ducting will be a challenge, like Gene says. You may end up with the evaporator under your tank in the front.

I have Ken Davis A/C in my Slant T/S for 15 years. Ken spent a number of years developing his kit.
You may have some "developing time" yourself in order to get it optimized to your likening.
Good luck with your adventure.