Accelerator cable?

So yesterday as I went to start my car, the cable that runs from the pedal to through the firewall to the linkage at the carb snapped right near the pedal. I have read through my repair manual's section on that area, and searched a few parts websites but I haven't been able to find any details on replacing this cable.

I'm really just wondering what kind of cable I need to get to replace this, and maybe a little info on the process of replacing the actual cable itself.

I have included a picture that should help you guys know what I'm talking about, if it isn't clear already.

Also it's a 2 barrel 273.