Harland Sharps

I just got them. They were in a PRW roller box but the box said they were for a big block. But I'm postive they are SB rockers. They are orange just like HS but I'm not sure. The HS and PRW rockers look just alike. All of the PRW rockers I have saw were blue though. They didn't come with chromemoly shafts either. How do I tell what brand they are?
http://www.prwonlinestore.com/index.asp?PageAction=VIEWPROD&ProdID=86