Right now I am in Iraq and spending time planning on replacing my stock 5 speed transmission to a 6 speed transmission. I ride an '06 Road King Classic with stock engine for reference. I have a few questions though and need some input. 1) Is it a simple one for one swap? 2) What are some quality transmissions? (Revtech, Prowler, OEM, etc.) 3) Are there any additional parts required? ( I just replaced the clutch cable about 2500 miles ago) 4) Any other tips or advise?