I've never used Rochesters on any of my stuff before, mostly because the throttle arms are made for up and down movement. But anything can be adapted to anything. To use those I would first turn them 90 degrees, and then make new/find different arms that are 90 degrees from those to allow them to move fore and aft.

The linkages I put on my own stuff have a cross shaft with two arms and links to connect the arms to the carbs, and the carbs together.

I tried to post a picture but I'm not sure how... any suggestions?