Should be FFS-2. Set up the FT-4 in the vise and mount the fork in the FT-4 so the crown is horizontal. Now you can run the FT-4 alignment gauge down the fork blades and see where the bend(s) are. I like to use the Frame and Fork-End alignment stick tools along with this rig - the FT-4 checks the alignment running down the blades, while the sticks check at the very end where the drops are. On an older, over-built steel fork like on most balloon tire bikes, a little off isn't the end of the world (in fact, many seemingly "perfect" old forks are off just a little bit). But large variations are addressed at the blades by the frame arm FFS tool and then at the drops with leverage on the fork end sticks.