I bought a double pass aluminum radiator with both inlet and outlet on the right side from Speedway Motors for a portion of the price of some name brand units. You can find them here...
Aluminum double pass radiator, $180 and they have varying sizes. The quality is super nice.
Been in the car for over two years of daily driving, including two 2500 mile road trips towing another car. Never had an issue, never have had to top it off yet. My small block 400 Chevy (the motor that everyone says supposedly likes to overheat) with only a 4 blade old school factory fan runs around 185 all day even in southern Utah's 110* + summer heat and towing up hill through the mountains got up to 195-198 a couple times. For the price you can't beat that value.