Here is how XVMOTORSPORTS handles the K-frame. Notice that the shocks and UCA are connected to the K-frame via a steel bracket, negating the need for running steel tubing in the engine compartment for support of the shock tower.
i believe you have to cut out around the stock towers with that set up. then weld a reinforcement that they give you in. thats the basic system there but if i recall that is more then just a bolt in.