Fuel Feed Line Size

[kryptik]

Hello,

I have a GM zz383 crate motor with a 680 cfm Quickfuel Vacuum Secondary Carb, being fed by a Carter Super Street mechanical pump, non-regulated. The motor puts out an advertised horsepower of 425@6000 at the crank.

Recently I replaced all of the lines on my '70 Camaro with OEM 3/8" hardline, as well as a new sender/sock filter (also 3/8").

I was told today that 3/8" hardline may be too small for this combination. I was wondering if I should go ahead right now and swap the lines to 1/2" hard-line, with a 1/2" RobbMC sender, or just stick with what I have. This is a street car at the moment, but I do not want to lean the motor out on those occasional track-days. So stick with the 3/8"? Or ditch it for some over-size line?



Also, would -8AN lines from the hardline to the pump, and from the pump to the carb, be ok?

Thank you for your help guys,
Matt