Original N&W Boxcars

[NW Modeling List]

Last year at the convention in Roanoke, Jim Nichols stated that the N&W never bought a bo60'sxcar until the PS-1 in the 60s (?).  In other words, we never bought an AAR.
Could someone point me to an original class of boxcar?  I don't know a side sill from a ...well you get the idea.  I can look at a drawing and see differences but I just don't know the terminology to say "Oh I see..." from descriptions.  I just would like to attempt to build so I can have a genuine N&W boxcar.
I did a search in the Archives for Boxcars built in Roanoke Shops and got B6 and B7 etc.  Most of the B7 seem to have been transformed into tool cars and bunks for MOW.  Those look like fun too.
Appreciate any input...including how to make the dreadnaught ends from scratch...I can envision Evergreen halfrounds sharpened in a drill press...those tiny ones facing toward the center look really delicate...Dad always said Nothing beats a try but a failure...I think that means I won't know till I try something.
Thank you,Mike Shockley
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