[69GP1]

Yes, that's the actuator for the cruise. You need a cable for a non-cruise car, they are readily available. Yes, it goes directly from the speedo to the trans.

Is the plastic tube that thin spaghetti tubing? If so, it goes to your heater valve (in line to the heater hose that connect to the back of the head) and the other end goes to the heat/ac controls. There should be another one from the firewall to a vacuum source to supply the system. The tubing fits into a small rubber vacuum hose where it connects.

My car has both pieces of plastic tube coming from the firewall, the longer to the valve and the other to vacuum. It's indeed strapped to the back engine harness, but I'm surprised it's included with a repro harness. If its not the small spaghetti tubing you're referring to, I don't know what it is.

The horn relay is next to the brake booster on the driver's side, I think the connectors only go on one way. There are three connectors on my car. I believe they come from the headlight harness, though, not the engine harness. That's the harness that runs down the fenderwell towards the core support and is attached with straps. It comes through the firewall under that relay almost behind the fuse panel.

Hope this helps..