Scosche GM1482 Dash Kit

On my truck it barely fit my new radio, I still don't have the wires aligned in back for a proper fit, and i even cut out some metal in the back of the dash to make it work. However, it is the only one available, and is the same one everyone in the industry has been using since the 90's. You just got to make it work my friend. Also, the color is probably not an exact match because your truck color is now sun faded... Overall, it IS the right one, you just have to wrap your head around the fact that it will probably take a little elbow grease and ingenuity to make it perfect.

Thats right about as much as you'll get from it.

It comes out 1.5 - 2 inches, so you should be good.

If by extension you mean distance from original dash to outside edge, it is roughly 11/16 of an inch. Hope I understood you correctly. Good luck.