[Ron/IA]

Jbuddy - Two books I use regularly are Les Andrews, Mechanics Handbook Volume I, and the Judging Stands & Restoration Handbook. Both have valuable and usable info in them.

A third book I look at often is the Ford Service Bulletins.

All three books are available from most of the Model A vendors.

Another valuable source are the members of a local Model A club near you (if there is one).

Hope this helps.

Follow-up note: As Mike stated below, that is the first place I would look too.