rawhead, before you chase more FSU lenses, go to http://www.lallement.com/pictures/files.htm and download the 1963 GOI and 1970 and '71 Yakovlev catalogs. They're very useful resources. Note, resolution figures are for the lens wide open.
Not quite a lens for 5x7. The 1963 GOI catalog says that it covers 196 mm.
A small caution. That monster's exit pupil should be ~ 84 mm in diameter. If you put it in front of a smaller hole, the lens' diaphragm will have no effect until until the stopped down exit pupil's diameter is no larger than the hole.