6 cyl k frame / need 7 qt oilpan

I'm doing the very same swap in my Demon. I looked at alot of deep pans including the low cost imported ones. I called Mancini's and spoke with someone there on their tech line. Whoever I spoke with was pretty sharp and said that I should lean towards either the Moroso or the Milodon Low-Pro pan.
I went with the Milodon but I have not installed anything in the car as of yet to see if it all clears.
I hope this helps..............Ted