front spring lift

I know there have been alot of people asking about suspension lifts already but I have already purchaced 2.5" lift springs for the front.

After I had recieved them is when I was told it was "recomended" to replace the upper A-arms with 2.5 or taller lifts. Can anyone tell me if I accually need to replace them or not.

Ofcourse I know I'll need to get an alignment after I install the springs.

Also, with 2.5" lift in the front, what size block to I need to go with in the rear to level out the truck. 1.... 1.5..... 2 ?

Thanks.

What are you lifting? Unless its a 2wd you can't lift with lift springs. As for the block, I'd say use 1 or 1.5" block.

I'm lifting an '01 2wd.