So…
There used to be companies that made spindle lifts for the 2wd trucks for the front, Fabtech was one of them. I have no idea what is currently available, you would have to search. If you can weld and fabricate, there’s probably other options to help lift the front.
Body lifts are another option to lift everything to fit, most states allow up to a 3” body lift. Some allow more, some less, you have to check on that. I know PA draws a line at 3” for a body lift.
The number of leafs in a pack doesn’t necessarily indicate 2wd or 4x4.
Stock rear blocks were 1” or 2”
Chevy drop shackles can lift the rear about 2”
31” tires may or may not rub. 3” of lift may clear 33’s. Think there was a guy on here years ago that did 35’s with 6” of lift on his 2wd.
Your transmission and all will probably hate you if you don’t address those. In my opinion, 3.73 gears are minimal for 31” tires and 4.10 gears better. You may be able to get away with 3.45’s but it will be a dog. For 33” tires, you’ll want 4.10 gears for sure. You’ll also need to get into the computer and change to the tire size or it will make a mess of the transmission because that changes shift points based on tire size