If your engine is going to overheat anyway, all that a 160 thermostat will do is buy you a little more time before it cooks. Rather get the cooling sorted and run it at 180, or even better at 192.
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.