Early A swap, oil pan problems

It had a /6 but I changed it over. Put a v8 center link and a v8 k member. Did not know they were the same up to 66. Took a 64 cuda v8 k member and took out my k member. I guess I didn’t have to change it huh ? Just can’t seem to find the right oil pan. I’m bout ready to cut 2 oil pans and make one !
Maybe someone who has more experience with that type of swap will have an answer.