Should I trade Evan Longoria and Paul Maholm for Mark Teixeira and Ricky Nolasco?

I would get Tex and Nolasco, in a keeper fantasy baseball league. I have Chris Davis and Josh Fields as third basemen also. Is it a good trade for me? We're standard 6x6 scoring. I have a lot of other pitchers that are good. As of now my only 1B is Davis.