I think adding a threaded plug to the exhaust manifold would make a lot of sense. On my intake manifold there is also a pressed in plug on the front at the end of the tube with that supplies each of the intake runners. I was thinking of pulling it and adding a fitting there as well. While helpful, both of those "solutions" wouldn't address the more likely points of issue in my manifold which is where the line to the valve makes the three 90° turns (why didn't they just run it straight to the valve??) and the four small lines to the intake runners. If I end up pulling the intake I will add four removable threaded allen plugs, one under each of the intake runner lines.
Andrew
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'94 Sidekick JLX 16-valve
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