I just fitted that exact 347 to my Cobra. Had it's first run on friday, and we tweaked a few things yesterday.
So far, quite impressive. Nice and smooth around town and a very nice note out on the open road.
I am running Imagine's 8TB setup and MoTec management.
Here it is
I will be using it for every day use, and so far, I think it's going to turn out just fine.
Cameron