98civic47

Hi I got a jdm d15b vtec motor running on a p06 ecu...I opened it up and its not chipped for vtec..i'm going to buy a p28 and was wondering is there anything i'm going to have to do for it to run right..my car is a 98 Civic coupe so obd2...I have the obd1 harness hooked up for the p06....so well the p28 be plug in and play our am I going to have to do some wiring....if so what and how....I've read about the o2 sensors my car has headers and test pipe with no o2 sensors.....its not throwing a check engine light so what needs to be done...any info well help thank you