You can leave one out of the bubble, close enough is good enough.

The key is to get it high in the tank so you can get it full.
a fraction here or there is ok.
Also, if it's in the bubble right near the other, you might get a false "full" spurt out of the muffler line.

so get it close but angled away from the muffler line.

we're splitting hairs now...but the ultimate answer is to shorten your fuel lines and get a third going.

have fun,
jw