Just a few questions before i purchase my JDM b18c swap from HMO. it will be going into my 2000 civic ex.

1) i was planning on getting a 2000 engine cause my car is 2000, however, i dont think its a law in ohio to have the same year engine or newer. so i may be getting a 97/98. are there any differences between those years?

2) how much exhaust piping will i need to add to my exhaust in order for it all to fit?

3) what all will i need to do with the wiring, specifically the ecu.

thanks!