Ray here is a summary of our discussion and a link to Steve Plucker's engine data.
Steve Plucker's..The Model "A" Engine Production Study
http://www.plucks329s.org/pdf/studie...n%20Charts.pdf
Engine # 657428 produced Nov 20, 1928
RB&JS page 8 Revised 2011, “Engines placed into production vehicles up to three (3) months after assembly”
RG&JS Page 7-6 Revised 2011, 2nd backing plate introduced in early 1929
Vehicle could have been assembled as late as February 20, 1929