340-360 Schumacher mounts

We are doing a slant 6 to 318 conversion in my sons 74 duster, the car came with the Schumacher 340-360 mounts included in the deal. Since I already have a pretty well built 318 we were planning on using that motor. I know the left side should be fine but I'm told the right hand side is different, is there any way these mounts will work?