A 90 Teg huh?

Well legally you're not supposed to take a motor from an OBD1 or 2 type car and put it in pre OBD car. Honestly I'm not even sure if the 90 Integra you're talking about applies to this problem, but it's somthing to consider either way.

But back to the motor. You'd probably be better off going with a B18 from another Teg because the Civic motors have way less torque. I don't pretend to be a mechanic so that's why my answers are a littl vague, but I'm sure someone else will hit on these same matters later.