The 68 Hurst Hemi Darts with auto trans came with 8 3/4 and ran 10 's . I don't know how many broke, but that's the way they came from the factory.
Greg
Wards Classic Car Radio Repair Specializing in restoration and sales of Mopar A B E body radios We can restore YOUR radio usually in less than 7 days Visit our NEW website.. http://www.wardsclassiccarradiorepair.com gregward@mchsi.com phone 256-852-0955