So, I pulled the engine out (I taped up the intake and covered it with a blanket)




I am positive that I had the mounts on the correct sides. Here is how I had them...





you can kind of see where they were notched by the DART block





It does look like I can pretty easily just grind out the area where the mount is "notched". I found a mustang forum with a big discussion on this, ie putting DART blocks in mustangs. Most of the builders were grinding the mounts and not the block. Some of them were grinding the blocks. Someone brought up a website Maximum Motorsports which sells a solid mount that fits perfectly without problem. I am concerned that with a solid motor mount I will have more vibration. Don't like that idea. I sent a email to Forte, surely he has a good resolution answer...