Depends.
There are two of the ZF-mounted angle drives and two tach-speedo units:
VDO and Borletti
Both must be installed as a matched set.
They are not the same ratio.
Believe the back of the tach has the needed information to enable you to get the proper angle drive.
Hopefully someone else will chime in with more details - I can't find the info I have.
Larry
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.