Pictures when it's done in this thread please .It looks like you have a D176 bar mount, which is 8.0mm.
http://www.arboristsite.com/community/threads/craftsman-roper-3-7.285229/#post-5517460
http://www.acresinternet.com/cscc.n...be9970357dbcb17f88256e0e001f67e3?OpenDocument
The small Husky is 8.2mm, just a tad larger. It should be easy enough to make your bar work.
http://www.acresinternet.com/cscc.n...eb5cdbe2ec67964188256e0d00525d23?OpenDocument
Let me know what gauge the chain is and how many DL it is.