hello. im gonna lift my f-150 supercrew about 2 in the rear and 3 in the front. my question is do i need to change out my shocks or can i stay with my factory shocks? what is the biggest size tire i can go with(i have 20in wheels)?

 

what year truck?

if its a 04-08 3" is to much in the front. i would go with a 2 1/2" Autospring.

with that you can fit a 35/12.5 tire with stock tires or aftermarkets with close spec's