K20A3 swap into a 2004 Honda Civic EX-EM2. 4 Speed Automatic Transmission?

I'm seeking information on this swap. I'm looking forward to swapping my D17 for a K series engine. I wanna swap in a K20A3 into my EM2. I've been doing some research and my car is a 4 speed automatic. And the K20 is 5 speed automatic. Thats one of the many things I think I'll hit when trying to do this swap. Can anyone help me out with more info on what I'm gonna need if I do this swap.

Along with all wiring harness's and computer. Mounts will be different, axles, more than likely some small modes due to mount locations. Not a weekend job and have that part car available you'll need to go back to it a few times

It's a total waste of time and money, look for the car you want and trade it