Working on original 77 cutlass with 350. Needing radiator. Will a 3 row copper brass interchange with a two row radiator in the saddles? Looking at replacing it with 3 row copper brass from summit racing. Any recommendations on thermostat?

 

I just put an aluminum Cold Case radiator from Summitt in my 75 Hurst Olds. I had a 4-core and the new one fit in perfectly. It dropped temp about 25 degrees. Very pleased.