Yes, any manifold or headers for a 3.1L will bolt up to your engine... and being a GM engine, these should be easy enough to find. However, can't guarentee they'll fit even your engine compartment and layout unless you find them specially for the Rodeo. Maybe someone else will know of an application that can be gaurenteed fitting.

-Rob

Robert Gorrell
1995.5 Isuzu Rodeo - SAS'd and SOA'd, sitting on 38x13 TSLs, spooled D60 front, 14bff rear locked by detriot, high steer w/ hydro, dual Isuzu tcases.