Most people on here like to run as small a lift as possible and still get away with big tires. Bigger lifts dont flex very well but you probably need a tall lift since your running mud.
Anyways, your obviously gonna need a lift. What brand is up to you. You can get away with 44's on 6" of lift if your not afraid to trim the fenders a lot. With 44's, your gonna need 1-ton axles. That would be a 14ff rearend and a D60 up front. With 49's, a 14ff will work, but you might be pushing the D60 a little too far. Aside from that, your gonna need to re-gear (at least to 5.13 which is as low as the 14ff can handle.....iirc there might be a 5.38 or something out now). Along with the lift (you obviously need a tall one since your running mud...and arent too concerned with flex and how top heavy it will be) your probably gonna need new drivehsafts with cv joints, extended brake lines, raised steering arm, new shocks, etc. Dont forget that your motor and tranny wont be happy turning 49's so look into a nice motor (or dump some money into yours...ie heads, a cam, intake, maybe fuel injection, manifold, headers). Also add a BIG cooler to your tranny to keep it alive.
Look around on the fourms here. This topic has been covered 1000000000 times, and you can more than likely find what your looking for by just looking at other posts.
-Harrison