do i need

new a-arms or anything up front when i bag my 2000 silverado

No, you can use all your stock gear and run 20's.  You can add some spindles into the mix to make it less cambered in when laid out if you should feel so inclined.

ok thanks that really help alot thanks bro

will i need to cut anything up front?

Here is a pic on one being set up for 24,it dose have new arms but you dont need to if your running 22's

ok cool i have 20s now but i am lookin 2 get 22s   but ive heard that with the stock a arms you need to shave them or something like that is this true?