Something else. 
I put these on an Athearn reefer. They look nice:
...but since the bolster center is 20/32" (5/8") above the rail height, these raise the coupler height to where it may be problematic. I checked some other trucks, just for laughs. An Athearn plastic truck measures 17/32" and a Gloor Craft is 16/32". It may not sound like much, but since it does effect the coupler height, I think it's worth noting...
Mark in Oregon
