Hi John,
On my last RV7 (same set up as yours) the 'snorkel' didn't fit both ends at the same time. I cut it in half and fit both ends then glassed it back together making a male/female separation flange in the center. Turned out real nice and looks great painted to match the rest of the engine compartment. I sent you some pics to your private email.
Call if you need additional help or explanation, you have the number.
Could you pass along those same pics to me also? I have the same setup and your description sounds different and possibly better to my liking than other solutions I have seen. Thanks!