Liberty Industrial Spur

[FCIN]

Correct me if I'm wrong, but weren't 40' Hi-cube boxcars meant to carry paper products?

Actually they were developed for the appliance industry for transporting large bulky items like refrigerators and stoves. I remember seeing a few of them from various roads in the late 50's on the Southern RY that were assigned to GE's Appliance Park in Louisville, KY. Of course the 40ft hi-cube was rapidly replaced by the 50ft hi-cube for the same service in the 60's.

I don't really need 40' boxcars, it's just that that is all that my LHS has, and I would much rather buy from them than an online retailer.

Justin;
If you're determined to use 40ft box cars just because that's all your LHS has in stock, then you might as well back date your layout to the late 50's or early 60's. It could still be an independent short line that connects with the SP in your area and even leases SP power.