alfaxtc

I want to change the Becker tape head unit and have a few questions:

1. There is a delay for the radio to turn off after the engine is shut off. Will I run into a problem wiring the new head unit?

2. Is there a way to by pass the console fader switch w/o rewiring all the speakers tot he radio?

3. How is the head unit removed? Are there special radio keys?

4. I have problem with the front driverside speaker. It only works when the radio is on. When the tape player is playing it doesn't work. Is this a radio problem or a speaker problem?

Thanks
Alan