I just read this in an older Classic Motorsport magazine: "Another item affecting the system of arms and levers on the choke linkage is the horizontal bar between the two arms. If it's adjusted too short, it will hang up the jet on the front carburetor, if too long the rear jet hangs up in the "open" position causing rich running." What is the correct length of the horizontal bar supposed to be provided the slop is taken up everywhere else in the linkage?