67 Dart slant 6 to V8 conversion

I can't tell. I hope to heck you are not going to use the 67 style K member/ idler arm.

Yes, I'm aware of the 67 idler concern. Prior to me owning the car someone installed a new idler... and it fits nice n' snug. It was apart and I inspected the bracket for cracks or oval bolt hole and it's in great shape. If it ever wears out I'll weld in a later model bracket / idler assembly then.