I have a few flatheads v8s, 48-53. One came with the crossover in the front and manifolds with provisions for the crossover and one output for a single exhaust. The other had manifolds that has only one output, so I put a dual exhaust on it. Which is the original set up, and how can I get another set of the manifolds with the one output?

Thanks in advance for your many, many responses,
Chris