Briggs opposed twin fuel question.

I'm in the process of swapping in an opposed twin Briggs into my zero turn after the single cylinder Briggs let go. Anyway I'm having issues with no fuel when trying to start. The old intek has a vacuum line going into the oil dipstick tube and the twin does not. I'm pretty certain that's causing my issue. No fuel is moving through the fuel lines at all. My question is what can i do to remedy this? Can I drill and tap the twins dipstick tube and install a barb to fix the line to?

Thanks for any insight. I tried to insert pictures into the post but it doesn't seem to be working.

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Briggs opposed twin fuel question.