Two suggestions:
1) use a 45 degree fitting out of the carb into the filter
2) easier way is use 1/2-1" round steel spacers between horn bracket and manifold to move the horn forward. You may then be able to bend the gas line slightly without cutting and re-flaring to fit the filter. I have a Rochester B on my 216 and haven't experienced the flooding, even during summer. My driving is mostly local 10-15mi at speed under 45. Possible you need to drop float in 1/32 increments until flooding stops. I'm sure you checked that your float wasn't leaking or hanging up. Could your gas brand be the trouble? Maybe it expands more in hot weather than other brands...just a thought.
