As already mentioned, those are modifications you will have to perform. I did mine in a weekend plus a Monday for the driveshaft return. Ran the foot switch next to the hi-beam, the toggle into the center console. I have a 440/727 with 3.55s and I can drive 80mph @2200rpm. Had it in there since 2007 and have about 7000 miles on it. She is a weekend car. The only thing I goofed on was the GVO sat up against my H-Pipe for 2000 of those miles and the gasket burned out. They sell em for 6 bucks each and I replaced it already. The downfall you will realize is that you have to to run Mopar Manual Synthetic 75w85 at $15 a quart. I did some digging and found that MT-85 will work just as good from Redline and I bought a few bottles from eBay.

I still can't get the whole synchronization down of shift, OD, shift, OD, to split the gears but the 4th gear overdrive works fine for me