Re: fuel line size
It depends on just how starved for fuel the engine is as to how it will react.
Some combinations will simply lose a few MPH at the end of the quarter mile. Others will stumble and fall flat on their face after only 60' to 100' off the line; basically once the fuel that's in the carburetor's float bowls is gone and the pump & lines cannot keep the bowls sufficiently filled.
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