I am weary of messing with my 20r carb and bought the adapter to put on 22r carb. I need to pass smog in CA. I am looking for either a very similar 20r carb or 22r. I am wondering if anyone has tuned a 4x4 carb to pass on a 2WD and if they had to change jets and such. Naturally I want as close to stock in terms of load-response and features, but if I have trouble finding something really close, can I tune something that is reasonably similar? Like could I smog with a Canadian 4x4 22r carb if I tuned it right? If you have something for sale you honestly think might work for me, let me know.