On Tue, Apr 14, 2020 at 09:03 AM, spsalso wrote:

I thought sheet metal trucks were long gone by this time.  

To my knowledge, Fox trucks, and similar pressed steel (or built up) trucks were never banished from interchange.  They slowly disappeared, probably because they were all on older cars with K brakes for which railroads chose not to invest in any rebuilding. 
 
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Dave Parker
Swall Meadows, CA