When it’s built hit me up with your jetting. I’ve had issues with my 28s being super finicky between pipes. I bought some 33s I may switch over. Might just be my carbs though …
You’ll lose as much as 7-10 hp I’m guessing from the Shearers. As you mentioned, they do best with inframe drag pipes, the DMC will be awesome for trails no doubt.
I pulled 87 hp with SLP amd 91 with Shearers with the exact same set up as what your about to build. My numbers are in the dyno section