The Aussie 2V (or U.S. 2V heads) can use 4V headers but there can be sealing issues. Even so, the usual 4V headers are too larger (primary diameter). The header of choice is the Hedman 2V Pantera header that was sold by PPC (Larry Stock).
I have a set from when I was running Aussie 2V heads. I'm offering the heads, intake, headers as a package but will sell the headers separately if some buys the heads first.
Dan Jones
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.