I started my process with a trip to the car wash. I was dreaming when I thought “That’ll be good enough.” Nope!
So, I get home and pry the seems between the spot welds and used a torch to burn them out so the welds wouldn’t be compromised.
I wasn’t happy because I only had the little blue propane burner and not MAP gas. So, I took it to a my machinist who has a vat.
You need to do all you can to get the old oil and grease out of the seems.
I also trimmed some excess off the inside/rear of the half moon shape where the front of the oil pan goes. Just a little more clearance.