Pacific Car & Foundry.
Rib arrangement is similar to the FMC but the FMC has the underframe and bolsters bolted too the side sill (very distinctive bolt patterns especially at the bolster above the truck), very slightly difference side sill notch, and I've never seen an FMC with the stamped ends like that.
PC&F cars with non-terminating ends similar to the FMC model also exist and can be pretty hard to tell apart from an FMC unless you know the really tiny subtle features.