You saw this page on the Vetter site, right? -
1985 Matsu talks
The local library purchased Vetter's DVD about "How they got 470 MPG" - it was just a video of Vetter speaking to a group at a convention.
Some info about the route -
1985 FER Open class
You may have seen all of this, but just in case anyone else is interested in the info.
Additional info -
470 MPG-Craig Vetter Fuel Economy contests, better mileage
One of the unusual things Matsu did was to add a neutral on the top so he could drop into neutral from top gear and coast as efficiently as possible.
Jay