You should use a micrometer to check piston clearances. Mic the piston with an outside mic (Ross probably has a specific location to mic the piston at too). Mic the cylinder with an inside mic then set the inside mic into the outside mic and check the reading. Inside mics have inherent error built in. Checking the reading with the outside mic eliminates the error.
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.