1) advice is to let it idle for a minnute after high speed driving. Eg above 50 mph.
2) yes anything after 03 will probably have smart charging alternator. They do not charge all the time and only come on when load is put on electric system Eg. A/c , headlights. Etc. Should have calcium battery.
3) yes it is best to keep a standard bov or recirculating aftermarket one eg. Forge one
4) look at the VIN plate it will say it on there.
Hope it answers your questions.