Glad you read most of my postings on my rebuild. It was meant to aid others going thru the same thing, particularly the areas that aren’t well documented or explained. You will note I asked lots of questions from forum members. There is great advice from everyone and it really helped in my rebuild.
My garage was a 15 year exercise of collecting and adding. It doesn’t happen over night
And because I knew I would be doing a number of restorations I always bought the tools I needed vs borrow or rent.
There is a large opening in the chassis under the arm rest. In my car the arm rest is held in place with 2 plastic clips. You just pull the armrest up. I don’t know if there is any sealing of the opening. Mine didn’t have it and I noticed on my 800 mile road trip warm air flowed thru this area at speed. I made a mental note to seal this off for summer use (I won’t be driving this car during the winter).
You have a very nice car to start with. Take your time and get to know it. The clutch needing replacement will get you into the thick of things pretty quickly. Removing the engine and transaxle isn’t hard, but you need a long engine lift stand along with basic tools.
Regarding the shift tube, everything I read talked about how shifting was marginal even from new. So I decided to replace everything at the same time to get the best shifting possible. The main tubes are usually fine, it’s everything that is connected to them. Here in the us, the middle u-joint between the two tubes is unobtainable. I did find one OEM new one, but the shop wanted $400 for it and I said no way and bought RD Enterprises new version of this u-joint. It works fine.
Make sure you safety wire the roll pin at the end of the tube where the small u-joint bracket and the transaxle gear selector rod are connected. If that roll pin comes out you are stranded without the able to shift any gears. Same with the axle shaft roll pins, safety wire them.