Hi All The Gm ecm used in 90 - 92 camaros is a p/n 1227730. Was used in j-body cars with v-6 - just look for this p/n in wrecking yard. Reprogram eprom with file from 91 camaro v-8. Usually $50 if they don't know ya want it for a tpi install. eprom is about $45 from gm, just need to bypass Vats. Vance