People on the GT40's forum are crying out for ZF's, you'll have no problem selling it, $10k is probably under market value currently, especially if you have documentation of the inspections and verified good.
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.