Aluminum Radiators?

I'm looking at this radiator for my 68 shortbed. I have a mild built 400 w/ a 2800 stall converter. The radiator in it now is 26" wide and 25" tall and fills in the space nicely, but its shot. I was looking at this one, from Summit but I'm not sure if it will mount up in my truck, and will a 2 row be able to keep my engine cool? We got hot summers down here.