In my Coronet I purchased a Magnafuel300 for the single fact alone the bypass was at the pump and not the regulator. My bypass line was 18" instead of 18'. No way I'd run two full lengths of fuel line that distance if I didn't have to. Less likely your gonna have a leak, it's cheaper, and even if a regulator pump bypass was better the advantage would be negligible.

I ran this setup till the car sold, 6.5lbs rock solid.