Eliminating unnecessary wiring while LS swap

[cagodinez]

Hoping I can get some help or verification of what some of these wires are at the firewall and under dash before I pull. I'm going to start with the wires and vacuum line directly under the main bulkhead connector on the firewall. I think they were for the original cruise control, the orange one to the left of the bulkhead, I'm not sure anout.