AT makes it a bit harder. I don't think you can actually use a civic ECU in an AT integra.. but that is something worth testing. If you're possibly interested in a chipped ECU, ask Mr. Kidd, I think we have an AT ECU we can try... Otherwise you're going to have to get an AT P30 or PR3 or P61, and those are very hard to find, and expensive even unchipped.