No problem, it's not going anywhere if you change your mind. However. check the CFM on the '80 carb, it was somewhere around there they went back to less CFM on alot of models.
i still have it and will sell it, by looks of the other posts i thought you got one from someone else.
You gould take a pick of the linking on the left and taking the pic fron the back of the carb forward. That tang should be on the lower point of the linkage. No I havn't bought another carb I just changed the throttle plate but the airhorn leaks and I havn't tyed to fix that yet.