for all that is worth, the ONLY motor that is a direct bolt in to a 1st gen CRX is from a 1st gen Integra. D-series engines require custom mounts too. i researched this a while ago and emailed a few people that had done dseries in a 1 gen and they said that it really isn't worth the effort...a b series fits just as well in the bay and has much more potential. redpepperracing.com has a good deal of info on first gen crx