One more thought. It looks like the OEM carb still has the screw in fuel filter. If you plan to also use this filter it is best to replace it and keep a few spares.
They give no warning when they are about to clog up and leave you stranded. I speak from experience. The filters are available at NAPA for about 5 bucks.
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.