What I did was use the 4 barrel headers but I put exhaust port plates on first. This had the correct 2v match to the head and the correct 4v match to the header. Besides the cost of the port plates the only other cost was an extra set of gaskets. It works beautifully without any exhaust leaks.
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.