Well, if you're talking about where it connects to the rear drum, here's what I did:
Got two pairs of channel locks and pulled the spring back until I could thread the cable out. Took me about a dozen tries and I felt like I'd done a heavy workout! There might have been some expletives thrown in there too.

If it's the front end, dunno waht to tell ya.
Good luck!
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69 C10 2WD LWB Fleet 350/350 power front disc conversion (6 lug disc kit from gmcpauls) and new engine, PS, A/C, fresh fluids, SHE DRIVES!
FOR SALE $3900