In my case all guide plates were cut and re-welded and mostly the end cylinders, had to have the pushrod slots in the heads "modified" so the pushrods did not rub. The camshaft did not have large lift.
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.