hi,
i know this is not exactly what you asked for, but maybe it will help, or just give you a view of a different setup. there is 1 inch plus clearance between the the pivot and collector, plus a heat shield. don't know if the heat shield is stock. i had to adjust the linkage away from the header, it was rubbing somewhat. there is between 1/8 and 1/4 inch clearance now.
andyh