This is the inside of a type one with the oil grooves. I have had little experience with the type zero or one but it appears that the synchros wear out faster than the gear cones which is a plus. The type one design is more difficult to assemble but was told they shift better when they're in good shape---Lloyd Butfoy's opinion which I hold in very high regard.
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.