Try heating it with a torch...
No, seriously DON'T DO THAT!
This would be the fuel feed and return lines on the back of the TBI? Should just be a 5/8" line wrench for the line nut and a 3/4" to hold the fitting on the back of the injector pod. Spray it with some oil and let it sit for a bit too. There's nothing special about it but can be sticky after 20 years of being attached.