Fuel Pump Question

my advice would be to get the pump that works for the final goals of the car, no point in buying it twice

personally, i would go with the carter M6270

it comes with 1/4 NPT fittings, so you can run 3/8 in, 5/16 out and when you're ready to go with the sixpack, you can change the output to 3/8 as well