Well. Decisions have been made. The sedan went off to a local w114 enthusiast, and he seems to be making it a real road vehicle.
Next project step is clearing some space in the garage for the black coupe, so I can drop the fuel tank, clean the fuel lines and maybe put the car on the road for a bit.
Then once the black car is on the road, the plan is to make the blue car drivable by probably doing the same as the black car to it. But instead of saving it, the plan is to also send it to the local w114 Enthusaist for a part out. Maybe I will hold onto it until I'm sure I don't need any parts from it (like after I get my spare windshield installed because I need to make sure it's not broken on the way in).
Parts of the blue interior of the blue coupe may end up in the sedan after all.
Finally coming around to these projects. Long time coming!!
Edit: To respond to the above few posts where I was considering getting out of the w114s altogether:
I've got an opportunity to upgrade to a good running injected m130 w108 sedan, but it needs paint and has manual windows. Sitting here very tempted.
SE or SEL? The w108 is a nice car if well sorted. Many consider it as better looking with a lot more wood and leather but not as sporty as a W114.
It's a black rip-free MB tex interior car that has some minor surface rust, and a few small areas of rot underneath I could probably fix, plus a smashed rear bumper I've already priced out. So it would be an immediate paint job car. 6-cylinder injected SE. Chrome looks great overall. Seriously, just the power windows and lack of leather are the only reasons to not try to restore it to high quality. It does have AC. I didn't even realize you could get an S class MB without AC.
I think I got lucky and the w108 280se sold before I got a chance to go back and drive it. Then it showed up at the shop in Bethlehem, PA where my friend Ramon (who parts old benzes for a living) works. He immediately recognized it by it's banged up rear bumper. Apparently the injected m130 engine is being taken out of the 280se and put into a coupe (that is not in as nice of shape). It sounds like it was a very cheap engine for the coupe knowing the seller offered me the w108 for only $1250.
As great of a deal it probably would have been, I must focus on my mission to "thin the heard". My goal is to get down to 3 MB as quickly as possible: the black w114, the 280slc stick, and my convertible 5.0 SLC. Furthermore, I've recently come to the realization that other than the velour interior of my 280slc, it really might not be a bad platform to make my dream car: a stick shift, 5-seat convertible. I would just need to replicate the conversion done to my 450slc 5.0 custom convertible. It would be the most ideal driver with the six cylinder. But that's a totally separate topic.