Timing settings help

[IT Cowboy]

I set my timing yesterday at 16 degrees btdc for 3500 ft elevation where I live and unplugged the vacuum advance and plugged the port.

It runs great and I am getting a reading of 35 degrees at 3000 rpm with the vacuum advance unplugged.

With the vacuum on the dist. plugged in at 3000 rpm I am getting a reading of 55 degrees advance.

Is this an issue, am I misreading something or doing it wrong. This is with a harbor freight timing light with the advance dial on it.

The truck runs good now like a streak of **** and will turn over the rear tires. It also stays cool on highway or in town or just idling.