'64 Barracuda trans/shift lines question?

One of my cables was not secured after a shop rebuilt my transmission, and the exhaust burned through the coating. It leaked tranny fluid pretty badly.

I used fuel line and some sort of silicone sealant/gasket maker, and zip ties to hold the fuel line in place. I did this in 1995. Drove the car until the wreck in 1998. It has sat in place (full of ATF) since then. Not a drop has spilled since I patched the cable jackets with the fuel hose.