I actually figured it out mate, turns out even though both looms are obd2a the ek4 vti alternator is only a 3 pin, whereas the dc2 r has a 4 pin like the ek9, all thats needed is a vti alternator, my b18c is type r, definitely not US, thanks anyway for the reply mate appreciate it
Edit: still haven't solved the problem, i could get a vti alternator but would have error code 20 as i have a p73 jdm ecu which supports ELD (electrical load detection)