V8 k member?

30518FDE-AF14-4643-8791-FBAE9534ED5C.jpeg
This is a slant 6.
Notice the lower boss on the pass side and flatter like yours.
A little hard to tell by the angle of the photo of your duster but looks the same to me.
Im thinking your new mounts will Solve your problem if they are for your “biscuit mounts”.