So I had to have done something wrong, this is not just material fatigue
The eyelet bent, and was ripped off. The bolt that went through the linkage got a sick bend to it as well. I’m not really sure what went wrong here, as i didnt take the thing apart ( a friend did) so im not really sure how it goes together. Anybody familiar with the shift linkage on the th350?
Edit: this took me way longer to find than it should have.
Im like 90% sure I lost this. Goddamnit.
The replacement cable is also noticeably beefier, so...
It turns out a vacuum leak was to blame for my idling issues. The car has this stange line that goes off the back of the carb to the air cleaner, and to a vacuum diaphragm on the choke. That isn’t hooked up when I run the engine with the air cleaner off. That tiny port being open is apparantly enough to screw eveything up. Capped that off and everything runs just fine. Now testing with the ol harbor freight vaccuum gauge shows everything A-ok once it gets some a tiny bit of heat in it. New proper calibrated temperature sender from lectric limited is also functioning.
Car is also all purdy again. Time for some hasty glamour shots! Ill get some better ones when the car is back on the road.