@poster yes you can but i wont prefer you doing so,u'l hve to cut,weld the main frame as ep3 or dc5 subframe isnt a bolt on at city.
imo city isnt a good option for a k20 swap,i term civic 7th gen best for k20 swap,as i'm swapping mine too:D lol.
civic 8th gen comes with k20 too,summary is that civic not city is better for a k20 swap otherwise u;l end up in other issues like grip,bad cornering etc.if you are thaaaaaaaaat much intrested in k20 swap,sell your city,get a 7th gen civic swap it.
btw a good k20AR costs like 400k these days:D