[Miataracer]

I am not so sure on that '94 and older comment. I am not in Cali and am not totally up to date on what they require for swapping an engine but I am fairly sure it is against the law to swap an older engine into a newer car. I swapped a '95 b18c1 into my '94 Civic. The '95 I know for sure is obd1. I believe after that the engines switch to obd2.

As far as wiring, you will have to do some. I am not sure what all you will have to do but you will have to wire up the intake butterflies at least.

You can get away with the stock EX radiator but a bigger one wouldnt hurt. DOHC Del Sol radiator will fit right in the same spot as your stock one and is dual core so it will cool better.