Thank you Doug. But isn't the valve spring rate determined by the valve weight? It is the valve that has to be pushed back by the valve spring, so if you use lighter valves, you should be able to use lighter springs. That would make a more durable engine.
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.