I am about to start installing the plumbing and wiring on my bare body shell, and figure to start with things that go in the tunnel. I have ready:

brake line
fuel lines
accelerator cable
clutch cable
speedo cable
wiring harness

From past experience, any words of wisdom on the best order?

I would do;

Brake line
Fuel lines
Wiring harness
Speedo cable
Clutch cable
Throttle cable

You have to be careful that the throttle cable doesn’t get wrapped around the clutch cable which I’ve had happened several times. You’ll know this is incorrect when you push on the clutch and you’ll get minor movement from the throttle pedal..!

Handy pic for reference points that I located here on World
Click to view attachment

I would leave the cables out until the engine is in, seen several new cables mangled during other work.

Jim

Agreed. This is the order it come apart.