Looking for a rebuild kit for Troll Hole Carburetor. I used the Hygrade 791B carb repair kit and it looks like the vacuum diaphragm is too long. When I manually open the primary throttle valve to 90 degrees from horizontal and then try to do the same for the secondary the diaphragm sounds like its hitting the diaphragm housing. The secondary throttle valve does not fully open to 90 degrees. Do I have the correct kit for the THC rebuild?