Narrowing 8 3/4 details

1. You need to see your local driveline shop for that, and yes ANY time a major component is replaced it needs balancing
2. You can use the original rear as the template by measuring the angles from it
3. Well thats how many shops do it, but like i said there are 10 ways to do something and only 1 is right. The problem with that is there is too much movement and you won't have it right, and the 2nd is you can't check it and see. Also all brackets get installed 1st as that welding will move the tubes.