Speaking of Trail Blazer, I found this record from the General Chronology of PRR 1939:
"June 29, 1939: PRR makes the first announcement of a deluxe New York-Chicago
coach train; NYC is caught unprepared and rushes to develop its own
version with ordinary unstreamlined heavyweight equipment.
(PubDept)"
I believe the deluxe NYC-Chicago coach train was the Trail Blazer, and NYC was rushed to make a mixed train consist for Pacemaker. No wonder I never heard or read about the Pacemaker turned the table in term of ridership; pic of the prewar Pacemaker is also as rare as Raymond Lowey’