yup..it will easily..max those games ..but i would suggest you to oc your FX 6300 jus to get the maximum out of it..
but incase you play those games now...just make sure no programes are running ,except the game...
Having a 650ti with an fx8350 and playing preety much everything on ultra with 45+fps, i can preety much garantee that the 760 will have no problem maxing nmost games
Would it be an alternative changing to 660 ti ?
I would keep the 760, they are even cards (760 is better in some specs, viceversa) it is also a newer card, that is always what you should consider aswell.
the 760 is the best nvidia card for the money, it runs every game so far on max settings without much problem. in the future you can SLI and have a better performance (or the same) than a GTX Titan, keep the card