Stephen,
A phelonic spacer under the carb will help isolate the it from the heat of the intake. That's what it's made for. You could also use a heat shield under the carb, I think Holley used to make one. You could try Summit Racing at 800-230-3030 for these items.
Michael
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.