Hooker header shift linkage flip?

I'm putting some Hooker Competition headers on my 71 Dart 318. It has PS and column shift auto. The engine is out of the car so there is tons of room to work. The instructions say to flip a part of the shift linkage and bend a rod, then there is a part to cut and weld. Has anybody installed these headers and done all this that can walk me through this or take some pics for reference?