I know what you are saying about the angle of the cable. If anything I would probably make a bushing to go under the existing bracket and raise is up. I hate to mess with the stock mounting locations too much, trying to keep it as stock appearing as possible.

On the mounting location of the linkage connecting the carbs are you saying to use the large hole above where it is mounted now? If so I don't know that I would have enough pedal travel to get full throttle then, would have to look into it.

Here is a better picture of the throttle cable. Didn't have time to mess with it last night, had T-Ball, maybe tonight.