For an '89, he'd need a late model Integra black/browntop engine... it's a half-breed between the brown and the black top engines... basically a browntop engine with a black valve cover and blacktop electronics system.

For what it's worth, you mean 90+ Integra or 88+ Civic. It's almost as easy to work with an 88+ Civic as it is a G2 Integra.