Re: throttle cable issues
What is done on the Pantera that Mike Drew was referencing is that the cable attachment point for the throttle cable is moved to below the centerline of the carb throttle shaft in lieu of above like the "conventional" arrangement that you refer. Many carbs have linkage attachment points that can be either above or below the shaft allowing linkage to either push or pull from either front or back of motor. If yours doesn't you can fabricate a simple bracket that attaches to the carb that allows the cable to pull from the front without reversing the carb. It probably doesn't matter with most manifolds but there are some like the Offenhauser dual plane manifolds that the carb orientation if very important.