Hondata

So I have a 02 daily with a 04 donor car. I was wondering which ecu I should ship in for Hondata. Does the imobolizer still read from the ecu and key when you get the Hondata stuff installed or does it not and you just turn off the immobilizer in k pro? If thats the case would it be smart since I have the perfectly good working ecu out of the donor car to send in incase I ever take the car back to stock?

IF the key and immobilizer are matched then you can send that ECU in and it will continue to be matched with the K-Pro.