Old Skool....

You don't need a BOV with drawthrough.
When you snap the throttle blades shut, the compressor housing intake is starved for air. No air into the compressor, means no load on the shaft. So you dont have the compressor pumping against the deadhead. Therefore the compressor wont stall. (It might even speed up the way a vacuum cleaner does when you block the inlet, and with no load on the impellers it speeds up)
You can run a BOV if you really want to, but it pays to loop the blown off charge back into the turbo intake. After all it's fuel and air, in the right ratio to go boom!
No fuel goes out the wastegate, as the compressor and turbine sides of the pump are isolated from one another. And all the gas which passes through the turbine side, has already been burned in the engine.