You can use any mounts (hasport, avid, etc...) that convert 92-95 civic to B-series. Same mounts for the B16A, B18A, B18C... Also, you'll need new shift linkage, tranny, and axles...
As for keeping it OBD-1, the engine is already OBD-1, so you can use your stock ECU. You'll get a check engine light for the Vtec pressure switch or Vtec soleniod because your "EX" ecu is looking for vtec, and not finding it. You can just get an ECU out of a 92-95 Integra LS...
Good luck with your swap!