Nine inch clutch sources ?

Got an e-mail from Spec.. 10.5" clutch. Most applications don't think early A's ever had a small clutch. As far as I've ever known, the diameter of the disc is the clutch size. I just took my 66 Dart apart. HP273/833 4-speed. The clutch disc was 9" and the bolt circle is 10 1/2" for the pressure plate. The clutch manufacturers need to get their head screwed on straight for this application.
I asked Spec for specifications and measurements but as usual, Most tech people are brain dead and don't have a clue what their talking about. I gave them my application and told them the pressure plate bolt circle. I'll keep you posted. toolman