Making it street legal would be a top priority (to me). But at least in my area that won’t be too hard. I have looked into the details on making a kit car with a bike engine street legal in Texas (in a county that has OBDII required testing). And according to the state they will give an...
http://www.jrautoparts.com/images/hondaclip/b16a%20OBD0%20changeover.JPG
A popular way of obtaining an engine to swap into a honda or other Japanise engine. Is to purchase the "front clip" it usualy includes everything you need for the car plus this way the wire harness is usualy uncut.