Had a 4/5 McGaughy drop on old truck with stock 33" tires. Rubbed a huge hole in fender liner.
Went with a 4/6 Inez drop on this truck with 31" tires. No running issues at all. Same exact rims.
The Belltech front springs along with the control arms will give you a 6" drop up front. Can always see if someone on here is selling their stock springs.
Also, you can buy just the front control arms, rear brackets, and rear shocks from Inez and save you some money because it comes with Belltech rear springs as well. You just cut them down to the size you want because they send you the exact 4" drop springs you have now.