My engine is 2276. I have the other empi breather box Wolfgang has pictured. I have two hoses from that box dumping into each carb.
The reason i wanted to add breather box for valve covers is due to oil leaks. I have been battling small leaks at the valve covers that drip on to the exhaust. I have tried all the various gaskets and methods and still seam to get leaks. I thought crank case pressure might be causing it so I though I would give the vents a try. I could run hose from the vents to exiting breather but that is a lot of hose to wrap around to that side of the motor.
The Beck Speedster has a nice shelf above the fire wall that would be a good spot for the new breather.