No not yet because I have to order the 2 bolts and I don't like to order so few parts. Will add the velocity stack next time when I need to take the engine off.
The engine ran/runs superb without, it's just to tweak it even a little more. All the fuel on the engine box is because the engine has been leaking a bit through the crankcase halves for all those months. I used Loctite 620 this time as sealant, hope it'll hold. Permatex Ultra Copper works great too.