Lately I have been having what seems like a unique problem with my '70 Charger. When I put gas in, rather than flowing smoothly into the tank, it accumulates in the fuel filler neck. Note that this is a newly-installed tank and filler neck, so there might be some problem with the installation.

However, I'm interested to know if anyone has had or heard of this kind of issue before. Do you think there is some obstruction in the fuel filler neck? How would I go about determining what that obstruction might be? Any tips or tricks that I might use short of dropping the gas tank? I'd like to avoid a major project if at all possible.