nukeday...The Offy 6204 CW doesn't have any egr hook-ups plumbed into it, so it isn't a problem. Nor do you need an adapter to bolt on a weber 32/36 or 38/38 carb to it. The rest of the stuff you still do need (coolant hose connectors, vacuum hose connectors, etc.) are already threaded or plumbed into it so you can swap your old stuff from your stock intake over to it.
Technically, it's for off-road/racing applications only - which is why it has no smog connections in it. But if you live in an area that has no smog certification requirements like I do - then it really doesn't matter.
For the stock Isuzu intake, you can remove your intake, flip it upside down, remove the egr, and use a die grinder to hog it out or use a large drill to clean it out a bit and thread it with a tap to plug the hole in the intake that is there for the egr.
You can also take that stupid constantly leaking crossover pipe that runs from the intake to the exhaust off and plug it off in the exhaust and the intake manifold too. I just cut the tubing off, remove the fittings from the exhaust and intake manifolds, removed the tubing out of the fittings, threaded the inside of both fittings, plugged them, and then put the plugged fittings back in on my old G180 engine's exhaust and intake.
To eliminate the the air injector rail, I just cut off the small tubes going into the injector nozzles, screwed the fittings out of the head, removed the tubing from them, threaded the centers of the nozzles, re-installed the nozzles back in the head, and used some grade 8 allen screws with thin brass washers to plug them.
After you remove the air pump, air injection stuff, egr stuff, etc., you will have a much cleaner looking engine that runs and sounds a lot better.
Everything you will need to de-smog it you can easily find at any hardware store pretty cheap. I used brass plugs for the big stuff, but steel ones for water pipe will do too, as long as they seal.
I know for sure when I completely de-smogged my old stock G180, bolted on my header, and switched to an electronic ignition with a 50 amp alternator, plus added a weber 32/36 carb, it made a huge difference in my fuel economy and especially the amount of horsepower/torque it had.
It wasn't quite as potent as my current Impulse 1.9 G200 engine with all of the above plus a slightly beefier than stock cam and the bigger weber 38/38 carb, but it was still fun as hell to drive.
I hope all of that helps ya!
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