One thing for certain: the fuel tanks for a carborated '89 and a fuel-injected '90 are not interchangeable. I had hoped for a capped off plate on the tank, but the carborated tank lines are on the side, not the top. And there isn't an "either/or" cap from the factory on the tank.

From a manufacturing point of view, I would think Mitsubishi would have made one part more universal for the various models. I'm finding they went to a lot of lengths to be specific per vehicle.

I do know the carborated tank's pressure is much lower than the f.i. tank, and this is reflected in the fuel line pressure rating, too.