Red,
I use one of these in my Zephyr wagon with the Holley injected 557. No problems:
https://aeromotiveinc.com/tech-help/phantom/ It has 15K on it including road trips and race tracks such as Daytona without any hiccups.
My Cobra with the Holley injected 521 uses a sump in the bottom of the rear of its aluminum fuel tank. It was constructed by an ex-drag racer way before the Phantom appeared on the market. If you like I can give you pictures and details but I think you'll like a Phantom a lot more.
Tom