I have a Model A with original tappets. When I next do the engine I will install adjustable ones. Of the double or single lock tappets, which is best from the point of view of movement and requiring less frequent adjustment?
Once they are adjusted and set, there really is no difference between the two. Only difference is ease of adjustment. The single locks are adjusted with two wrenches, doubles require 3 wrenches.
Date Added: 04/18/05