yes absolutely.  the top psu for this model is Dell oem 360w with 6+4 pin white and one 6 pin PCIe connector.   8HKG7 360W Liteon Gold 19YR3 Chicony Gold If you only want the 260 w psu, it has only 6+4 white pin and no PCIe 6 pin, which is not a major upgrade from 200 w psu. Optiplex 7060 MT =52CKC 260W AcbelGDCXM 260W Chicony4THK0 260W Delta3YNRJ 260W LiteOnTP18W 260W LiteOn 7060 MT and SFF psu are interchangeable 
Is it possible to upgrade the PSU from this Optiplex??  Thanks for your help! 
I need to upgrade PSU 200W to PSU 260W from my OptiPlex 7060 Small Form Factor