Zenki ka24de into Kouki - what issues arise?

[KADRIFTER]

OK, so i know you all want to flame me for this but I'm having problems searching.. Everytime i search the results page shows up blank so i have to ask...

I have a 96 5 speed Zenki 5 lug w/ the ka24de built to high hell. Problem is the body has some major dents, suspension issues etc... and it wasn't really the body i originally wanted (wanted the kouki but settled for zenki). Now i have the chance to buy a kouki for a great price - perfect condition, 126K on it, 5 lug, but it's an automatic.

What issues arise if i wanted to swap my zenki ka24de into the kouki? I know the kouki is OBD II so there must be a wiring harness issue and ECU issue. Also - if i swap in my 5 speed to the kouki will i still be able to pass smog or is there a sticker or something tagged to the VIN that says it's supposed to be an auto?

At least post some links for me to check out if you know of any, like i said i really have tried to search but I'm running out of time and ned to make a decision.