John Deere 318 /300 series garden tractor plow retrofit

Hi. I am attempting to retrofit a 54" power angle plow removed from a John Deere 318 Garden Tractor to another tractor (Simplicity Legacy).

I am looking for the height of the holes in the frame in a 300 series garden tractor where the spring loaded pins on the quick hitch attach to the frame. (distance from the ground to the center of the holes).

Any help you can provide would be appreciated!

Thanks, John

6.5" to the lower slotted holes. 14" to the upper lock holes. On a 318.