65-66 small block motor mount brackets

Looks like a 6 cyl K with a conversion mount.
The pic shown is my original 66 Dart with 273 brackets. My buddy has an original 65 Dart that had a 273 and 4 speed but was replaced with a slant6. We are trying to get a small block put back in. The new small block will be a 318 until we can find a 273 or 360.
Thanks!