68 Barracuda Convertible 452 cu.in. 4-speed

I'm running 335/30/18 on the rears. The center cap size should be app. 8 inches to fit the wheel

OD of my cap is just barely over 9", guess it will work. Did you join your mopar cap together with the ring of the cap they sell with the wheel? How so? Epoxy? Welded?