moveing air line box on stretched peterbilt

For air, you either run new longer lines or use unions.

Electrical, splice wires is probably the only realistic solution. I like the heat shrink, heat solder connectors, but you have to make sure the solder flows.

 

Look for the self solder/heat shrink connectors, they work.

I would look at Del City [all kinds of electrical goodies] and also get a good length of shrink tubing to armor/protect/camoflage the splices.

 

Use this for your electrical line. Butt splices are not reliable, even heat shrink only does so much against road salt.

 

might attract less intrest from the DOT too