I ran the cable through the passenger side of the hump near the firewall. Put a holder on the upper bellhousing bolt then down the drivers side of the bell to the bracket, That keeps it out of the way of the headers and exhaust heat. What I found is if you sit in traffic and the cable gets hot and soft the strands in the cable sheath will peacock out of the cable.
I once left my car running while I ran in somewhere , I cam out and it would not go in gear. The outer plastic got soft. Put insulated heat tube on the cable. I actually fixed the cable by wrapping mechanics wire real tight and close around the damage area. Usually the cable with the kits are long enough.