hmm, thats weird,
If you have
Key
Lock antenne
EWS module
the DME for that EWS / Engine
then you should have all the rolling codes to start
If you dont have ALL the items from the one engine over to the other car then you will have start issues
You can code the DME (depending on engine / MS type) to match the EWS, but not the other way around..
The easiest would be to move the lot over form the one car to the other
ASC system won´t stop the car from starting , so you should be good to get the engine running, but you will need the ASC system in place , otherwise its ABS lamp on all the time ..
Regarding smog components, if in which you mean cat converter.
The set up on the 2 are different if you are fitting an M44 in a M42 based car .. but thats why i need the chassis numbers to see component differences
let us know how far you have gotten, so we can help