Ok funds are tight and wanting to do a 4 inch lift. I currently have brand spanking new 31 inch BFG all terrain tires. There is no way in hell my wife will let me get new 33" tires. Can anyone show me how silly or not so silly it would look.
I know its not what you looking for, but...MY $.02
I'm not an expert here but I think having a substantial amount of lift height with a small foot print (inadequate tire size and wheel backspacing) may be conducive to roll over conditions. Just an FYI.
Check out a Budget Boost lift to hold you over while you save up for new tires, then get everything you want at once. You can get Budget Boost lifts for as cheap as $200 and they make your jeep look like this...(on 31s)
wait till your tires wear out. thats what i had to do, you will also notice that if you go out and buy your kit now you will end up getting something you are probably unhappy with, if you wait till the tires are bad you will have researched so much on it you probably wont want the same lift as you want now, first i wanted a 4.5 SF, by the time my tires wore down i was on a 2.5 OME. trust me you will gain more knowledge if you just wait. while i was waiting i threw on a BB just so i could get by. also if you are going to run 31s for a lil while and then switch to 33s, look into the RC2.5 or OME from DPG. you can use the 2.5 inches of lift while your waiting and it will still look and ride good and then when you want your 33s throw on the body lift (if you go with the RC you will have to purchase that sepratley). 2.5 inches of lift looks great with 31s. when the 33s come around the 1 or 1.25" BL comes in and it really looks great. if 2.5+1.25 aint enough for you and 33s throw on some 3/4 inch spacers. thats my 2 cents. if you go with a 2.5 right away you can still use it with the 31s and 33s and your not wasting money on a BB. also a 4in lift has a lot of extra mods that need to be considered. 2.5s usually dont.
If the suspension lift is going to be right at 4", I would get it, and run your 31's. You could search for a used set of 33's for a trail set. One thing though, if you get a 4" lift kit you may gain more like 4.5-5". Might be something to consider. I wouldn't do a BB if you already know you want a 4" lift.