Civic EG

Can I use the sane wiring harnes the vtec is already wired? And I heard I also need to change control arms other then that I know what to do help!

you dont have to change any control arms you just need the integra motor mounts cv axles and if im not mistaken there are 2 vtec solenoids on gsr's

1 vtec solenoid, may have to extend wires but thats it, the only motor with 2 vtec solenoids is the jdm d15b obd2a model, your stock harness will work, you need axles rear t bracket shift linkage motor mounts (mounts are a maybe my 92 eh2 hatch is using d series mounts on both sides