It will probably work. Can you mock it up with a bare block? I am building a 64 Dart and will be using a 699 pan from a C body. The last deep pan that I installed in a 383 66 Valiant needed to be clearanced near the idler arm I think it was. The 699 pan has the relief in it.
Don't why letters came out so large on 1st post.No all my motors are finished.Im sure it will drop in just thinking about idlerarm hitting NOT SUREops: