I heard if you get everything from a del sol si dohc, ecu, complete uncut harness and all the stock smog emission parts or smog legal aftermarket parts, and convert to obd-1 you could regester it as that b16, then smog it. I assume this would work if the ref didn't check the date code on the motor. Just "heresay" I'm not sayin it's true. Maybe someone could straighten it out for everyone.