Do you have to swap K members for /6 to SB?

-I would/have swapped the Ks.
- Having said that, there may be good reason to go with the Schumachers. Those Ks can sometimes be trouble in that the bolts like to seize in their frame-nuts. Knowing that now,drilling an access hole and presoaking for several days with a penetrating fluid seems to work. That and a big impact gun. Also there is a lot of parts swapping involved which inevitably leads to parts replacement and a realignment.This can lead to several hundreds of dollars.
-Of course doubling your horsepower, leads to lots of other chassis mods too. You know, upgrades to; suspension, steering, brakes ,cooling system, exhaust,running gear, the tranny, the rear end, frame connectors,bigger tires, BIGGER tires, BIGGEST TIRES. The list never seems to end.
-A well set-up, 400hp, A-body, can be a blast. Make that IS a blast.
- Happy modding.