When you find one, buy two.
You don't want to burn up your ZF clutch packs by running significantly different diameter tires on the rear.
Or you can run 8" Rears, and 7" fronts, so you can move the rear to the front in case one blows.
Rocky
PS> This was a regular tire explosion, not a spare.... But scary to look at....
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.