gears

Hey everyone, before I get into my question (which is probably dumb), I just want to give a brief history of my YJ (and my possible routes I can go). I have a 1989 YJ my grandpa bought in 2003. It has 0 rust, a 4 year old repaint, brand new 4cyl (TBI), 30 inch Toyos, new top, seats, steering...

I am wanting to start looking into re-gearing my 1993 YJ. It came with ARB lockers in the front and rear, but needs some more power when I am out on the trail. I believe that the gears are 3.77 right now and would want to go to 4.88s and my question is, would I be able to keep these lockers or...