42RH in 68 Dart advice/request

Good Morning,
Thank you all for taking the time for replies and photos. I'll have to put some thought into this, I know I have some uncomfortable family stuff to deal with coming up (in another state-you know, just to add to it all). I need to decide if I want to try & weave this into the mix, or try and find someone I trust & just get it done. I'd rather learn about it and do it like I did with the rest of the car, but every project has turned into multiple starts and stops and re-dos. I can also see this dragging out well into next year since our busy time of year is coming upon us at work.
I'll give an update and let yall know how it works out.