Gauges

1. generally anything from 90*-270. Many elec gauges are closer to the former number (90-120*). AM does make some full-sweep elec's though.

Most mech gauges are 270* sweep. Look at one of each and you can see what that means. It is the range of the needle and numbers.

2.The gauge should have all fittings, sans perhaps adapters (like for the temp gauge).

3. Never looked.

Good luck.

as Hissin said, the sweep depends on your needs. I have mechanical gauges that sweep 270* which is almost the entire gauge. Other electrical gauges have this also but most are the 90* sweep type. Less sweep, less space to print numbers on the gauge, and less specific readings.

The gauges will have most of the adapter you need. BUT NOT ALL. You need to talk to the AM tecks about it. Make sure you have whats needed cuz for the old fox 5.0s you need another adapter for the temp sensor.
Joe E.