“The Model A Carburetors” This book is restoration manual, data reference, and covers the history of types, changes, operation, testing and rebuilding of Model A Zenith and Tillotsen carbs. You will find a short introduction to Model A carburetors including single & double venturi type, on the Zenith-Holley and the Tillotson Model X. You will also find step-by-step overhaul procedures, repairs, troubleshooting help, and a Model X parts list. Covers all 1928 thru 1931Model A carburetors. 56pages and 53 illustrations. A must have book for the Model A Owner. Year Application 1928-1931.