Mark Rickert reminded me there was a multi-part series in RMC several years ago on these cars. Looking back through my notes I found these plus two other articles.

Bob Chaparro

Hemet, CA

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Model Railroader

November 1964

CN Overhead-Bunker Reefer

by Craig, Allen E.  Geissel, J. Harold

Page 32

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Railroad Model Craftsman

November 1983

Protofile 28: CN Eight-Hatch Reefers

by Swain, Stafford

CNR  Protofile  Prototype Reefer

Page 71

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December 1995

Canada's Eight-Hatch Iced Refrigerator Cars, Part 1

by Goslett, Ken  Swain, Stafford

Page 70

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January 1996

Canada's Eight-Hatch Iced Refrigerator Cars, Part 2

by Goslett, Ken  Swain, Stafford

Page 63

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February 1996

Canada's Eight-Hatch Iced Refrigerator Cars, Part 3

by Swain, Stafford

Page 80