Costco usually carries both orientations of the group 27. I know because I bought the wrong orientation also. Took it back and swapped it out with the correct one without a fuss in about 5 minutes.
One more thing I would suggest. Look down the throat while it's running and make sure that both injectors appear to be firing evenly. It should be apparent. Especially try to do this while it's running rough and going lean. Each time you do something significant, (like making sure the injectors...
Might want to take 20 minutes and make sure that the fuel injector clips haven't broken or came off. It appears from the screen that you're going lean. (AFR in the 20's and 30's) Classic symptom of the fuel injector not being secured. If that's not it, you've lost virtually nothing. It's a...
Mine came in the mail today and @Unimogguy has gone out of his way to make sure that not only are they as close to original as possible, but that they made the trip unscathed. Get them before they're gone.
@Pigeaten My wife said she saw this rig driving around yesterday? Could it be that close to going home? As she was describing it, I told her it had to be yours. No way there's two ornch ones in the same town. Hope you're feeling better.