With the 14" prop, there's just a hair over 1" clearance on mine.

Received the ST2300 yesterday, so probably will start fuse mods/pics today, and mount her up. Don't have the header yet, but I can mount it with the muffler to break it in. I'll also be installing my taller CF gear from another project.

So here's the FIRST problem. See pics. The alum straps that connect the anti-vibration pads to the engine mounting lugs weren't made for a motor with lugs as long (front to back) as the ST 2300 has. So now, with them "half a hole" off fitting properly, I have to solve this problem.
a. Grind off flange material (not my favorite choice)
b. Replace the "straps" with new material, requires metric drilling/tapping (don't have)
c. Buy a DB mount, modify it, hope it works, or has parts that work.

BTW, the ST2300 is just beautiful work.