Stuck

My project has unfortunately ground to a bit of a halt. Colemill had used some different brackets and induction piping than what was shipped with my engine, and TCM and my shop have been going back and forth, back and forth, back and forth with shipping out various parts. TCM has been fantastically responsive and have been overnight shipping parts nearly every day, the problem is they keep sending parts we either already have or don't need.  Friday they overnighted yet more parts, and they don't fit.  Finally MaintenanceXpress tried out fitting the old parts, and those don't fit either.  I'm not sure what's going on, I think the only explanation is that TCM has made some slight design changes to the case since the STC was issued. Fingers crossed someone can figure this out...