Depending on the drop brackets for the TTB, you might do it.
Two ways to approach this, one is do it and see, the other, my way, would be contact Rough Country and see if the drop brackets are the same for each kit.
If the brackets are the same and then it would be a go.
The problem will be with the increase drop the angle of the tire and wheel get more in at the bottom.
Can the 4” bracket accommodate this, if not then new brackets are needed but some kit come with extra holes in the brackets to be used for either 4” or 6” lift so check your bracket and see if the holes are there and what position they are in in reference to the 4” mounting position.
luck to ya, my sky jacker kit for my ’88 had both sets of holes.
4x4, 5sp, Std Cab, Stepside, E4 Red
4” Lift - Coil-Overs, 6” SkyJacker Leafs - No Blocks (Mistake)
31 Spline FX4 Rear Axle, 4.56s and OX Locker, Hurst Shifter w/Optional Stick and "Made by Grev" alignment adapter