I have the milodon road race pan on my 1966 coronet. Its factory hemi K frame and mounts, all the steering in factory parts with manual box, and I am running TTI 2 1/8 headers I have no trouble with the pan. I like it because it give you ability to have large oil volume and does not cause issues with ground clearance. I have a build thread on here of my 66 coronet with some pictures you can check out if need be. Funny thing I picked up an old nascar pan at Carlisle this year, and it is very similar to the milodon pan.
Matt