[steelybill]

With that much torque you can get away with even a 2.56. My El Camino had a 2.56 with a built 400, which had great torque, and performed great.
My '76 Coupe Deville had a 2.73, and seemed "light on it's feet" for a 5300 lb car.
In my current El Camino project, ('75), I have a Currie 9 inch Ford rear with a 2.50 rear ratio, with a built Caddy 500. The car weighs 3750 stock, and the 500 is about 60 lbs heavier than a small block Chevy.