Headers for these trucks are pretty few and far between. There might be some out there, but they ain't cheap if you find one.

Like Kevin said, the stock manifolds on these trucks are pretty good. I'd say source a non-leaking one and go back with that. I might even have my old one still. Shoot me a pm.

87 Montero, bought new, by me -
88/89 intercooled Starion Turbo engine-
with awesome audio.