Not sure why you asked all the questions of the radio if you are simply going to pull it? :confused:

The glow plugs, if you remove the CC servo (four 5mm allen bolts from memory) you will be able to swap the GPs easily. I believe I do the No 1 by removing that crossover pipe and the 2-6 with the servo out.

I wanted to keep the radio original so thats where all the qs came from. But I want to try an aftermarket also. So thanks for all the help :)

and I will hopefully change the glow plug myself. It was 20*F outside today and it took 3 tries for the car to start. But I did forget to plug in the diesel heater

Sounds like you have quite a few out glow plugs if you have difficulty starting in that weather. Are you glowing until the relay clicks off? If not, that really helps the 603 start in colder weather.

You will be able to change the GP, do not fret. They are simple. Same for the others if you use my method of removing the cruise servo.

Understood on the radio.

I waited until the loud buzzer went off, about 10-15.

This afternoon I waited about a minute and it started like a charm.