This appears to be a stock automotive smog pump used for
for attitude and heading gyro vacuum. 
Another excellent detail on this fine airplane. 
Note the coolant pressure reservoir and pressure cap.
The white box on the right appears to be the overflow
container.

Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2002 All world wide rights reserved.