Jim,

Erie diagram book at...

http://www.rr-fallenflags.org/el/frt/erie-frt-book.html

The cars were built in 1940 with single doors, leased by GN in 1963 as
rebuilt double door cars via A. A. Morrison.

Specific Erie diagrams...

http://www.rr-fallenflags.org/el/frt/erie-frt-9-13.gif
http://www.rr-fallenflags.org/el/frt/erie-frt-9-14.gif

Builders photos...

http://www.rr-fallenflags.org/el/frt/erie78500adb.jpg
http://www.rr-fallenflags.org/el/frt/erie79000adb.jpg

Larry Rice
Port Townsend WA