Maybe not on SUs, but he said he's switching to triple mikuni 44. *my* experience with my cam/ carb setup (rebello 63D + triple mikuni 44s), is that the only problem starting is filling the fuel bowls (still running the mech fuel pump).
Personally, I think it'll be fine. Yes, you'll lose at the bottom end, but hey, that just gives you an excuse to let the engine scream some more
Though you are going to have to tune your carbs *really* well, since as Mag pointed out, it's going to lope, alot. Also, the cam + carb setup means that your idle is going to change a fair bit depending just on the ambient air temp and the engine temp.
And Monzter, when did 10:1CR become low?