just tweak on the linkage some more, I ended up making the one rod twice, the first time wasn't just so. You probably encountered the same problem as everyone else. One lever (the bellcrank on the block) goes in the forward to back orientation, while the linkages on the carb goes side to side, and the hole the rod comes up through isn't all that big, and when you actuate the throttle, it binds up somewhere, right? I enjoy doing that kind of thing, it's kind of the principle of the whole thing to me. However you can use a cable if you like of course. Just a thought is how to route the cable in such close proximity to the exhaust. I mean it can be done I suppose, it's just that I know it can be done with a rod as well. But it is entirely up to you.