Header melted the shift cable.

sprue said

We learn something every day. Previous owner had installed a B&M floor shifter and hooker headers. I dont know how adjustable these cables are but I'm about to find out. The cable was left very long and actually came about an inch or two away from the exhaust so after my third outing with this car since getting it tagged the plastic sheath melted and it's now stuck somewhere between park and reverse. I'm going to have to hunt down a shorter cable or find a better way to route a new one or wrap the exhaust!

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I went through this with my Hurst Promatic 2 ratchet shifter and got stuck on an incline.
When I went to drive away the center of the cable came right out through the cable sheathing so I couldn't even get the thing out of park.
I had to reach under the car with my jack handle and knock the thing into drive to get it home.
Hurst only has ONE cable besides a generic "fits all" and it's 5 feet long.

After some digging I found that B&M makes a 36 inch cable that the only difference was a larger eyelet on the shifter end. (Probably go right on your B&M)
It's called their "Heavy Duty Race Cable" and after making a spacer it fit my shifter perfectly and no troubles since.
The 36 inch B&M cable makes almost a perfect half circle from the shifter to the linkage and doesn't go past the bellhousing in the course of it's loop.
The new cable is a lot more positive in feel as well.

This one.
B&M 80831 B&M Shifter Cable, Race-Super Duty 3 Feet