Lol. I need to get one too, to take apart and change the backing plates for the parking brake repair. And like you say I will use it once and probably never again. Too bad these can't be borrowed from part source, like other tools, I just did clutch change and needed a slide hammer to get out...
I had my rad record on my 78, it was the same price as buying new, but it was the original rad with the copper tanks, or what ever steel the tanks are original, a new rad will be with the plastic tanks and generic to automatic and standard, I had 4 speed so original rad did not have automatic...
It is the turn signal return spring in the turn signal switch
You have to take of steering wheel to get to them. Any speed shop will have these. 1 goes on each side. For the cost your best to replace both. This pack was 10$. Or the whole turn signal switch with these is around 100$