3/8 fuel line 1/4 return for 600 hp ?

[waynieZ]

Hi I have a 69 Camaro with a 3/8 fuel line and1/4 return . Its going to a CV products mechanical fuel pump 170 gph . The pump has 1/2" fittings on it . The fuel system will feed a World products 454 small block it has the 1050 Dominator for a carborator . I would rather use the 3/8 feed to the pump, will it do me any good to put 1/2" line to the carborator or would that be useless? World said the 3/8 will be good from the tank. It will be 99% street driven. All opinions welcome Thanks Wayne