4.56 gears and e locker

[BITURBOAMG]

Hello all I am wanting to add 4.56 gears to my 05 h2 and the front locker. Wanted to get an idea of the cost of the parts and if there are any cons to doing this. I have the magna charger, intake, cat back exhaust, borla headers (which have cracked 3 times and borla does nothing) and I am running the bfg muds 335/55/22 on some 22x10 wheels. I am also thinking of going with a set of 17x10 or 18x10's and some 37's but want the same width the tires have now. Any info would be great. If I add the locker do I need to add the tie rods or anything else, will the 4.56's help out any?