For what its worth, I went with the Mancini package as I needed a pump and pickup as well anyway. Fit amazingly well. I do have 73 steering on my 71, not sure how much of a difference that made. Quite happy.
I saw that kit as well, thier oil pan by itself was a little cheaper than 440 Source as well. With how low my car sits, I like the idea of the thicker pan that 440 Source has. Glad to hear it fit!! I'm hoping to swap it out with the engine in the car. Not sure if it's doable because of the pickup tube though.