If you are running an inverted engine and have it properly tuned, all you have to do is remember to close down the throttle to a high idle before you hit the engine with the starter.

That is; you prime the engine as usual at about 70% throttle, then drop the throttle to idle, connect the glow plug and start it.

Leaving the throttle wide open keeps the needle open allowing the fuel to siphon back fairly quickly even if you have your carb line correct... as most tail draggers point the nose up while on the ground...

Reducing the throttle permits this to happen far more slowly, potentially taking several minutes to occur and giving you ample time to start the engine.