Definitely install the return spring. Adjust the free play at the slave cylinder adjusting screw to .102". Use a #38 drill (.1015") or a 7/64 drill (.1094").
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.