What size oil pan?

Thanks guys. I will be starting out with the Eddy performer 440 intake I have. Mainly since the budget isn't there for the single plain yet. I will be curious to feel the difference between the two. I do understand the benefits from a single plain to a dual also. A local guy has a 63 Belvedere wagon 440. He just went from a M1 to the performer 440. Says he felt no difference. Cant wait til this is complete and driving the car again.'