Got an 83 Ram Charger with a 440 today!

Check and make sure the bottom radiator hose is on the correct side when looking for a big block radiator.

The last small block radiator I bought new at advanced auto, and it was only $100 new.
That was about two years ago and it is holding up fine in my dads power wagon.

Can a local radiator shop repair what you have?
The new cost on a stock radiator for my 48 willys was $600, my local shop went thru my old one and only charged me $84 bucks and it was really rough. They had to crimp a couple of lines but the motor never even gets close to the hot range.
$500 extra cash in my pocket is a bonus.

If you cant fix the stock one look at Summit for their cross flow aluminum radiators, which would keep that big block really cool it the texas heat.