Jim seems like a stand up guy. Quick responses from the few questions I've asked. It sounds like he is considering getting USCG certification for the 600A next year.

Cool project. I ran a C5 corvette style deadhead setup on my 6.0L in my jet boat. The filter/regulator are built into one unit, and could be mounted near the tank on your application, for easy return of excess fuel.

That setup will EASILY support the 400 hp you're looking for....and beyond.

I prefer the Holley Dominator pumps. For the single reason that you can set the pump up to run in phases. There are actually two pumps in the body so one can be running at idle and the second can kick on at a predetermined RPM or boost level. This will reduce the fuel pump heating the fuel at idle and reduce size of the return needed.

https://www.holley.com/products/fuel.../parts/12-1800

Also, check out Radium. They have a very nice surge tank set up with internal fuel pumps. Really good to make sure you won't get a gulp of air into the fuel system.

https://www.radiumauto.com/Multi-Pum...Tank-P271.aspx

Pleased to meet you Wasted Income. I've read your threads concerning your LS Jet Boat several times.

Precision, Radium tanks are an awesome piece of kit, I just wish it was USCG certified.

I contacted Holley about a USCG pump, but no response. I'm really hoping Weldon can get certification soon for their 600A.

Thanks Again Everyone! I'll start another thread chronicling the build.

I know Holley' pumps are submersible and I belive they are going through USCG certification for the pumps of they haven't already.

With regard to the Radium tanks, I don't know how they couldn't meet USCG requirements. The units are sealed and all AN fittings.

I agree 100%. I'd like the sticker for insurance reasons and not having to worry about a run-in with the coasties.

we have had NO issues with the aeromotive A1000 or the eliminator pumps, with either carb or EFI, maybe just lucky...

I run the Aeromotive A1000 pump as well and that thing primed a huge empty fuel filter/separator in a instant. Not the quietest thing but primes my system up to 60 psi and holds it rock steady.

We use the Areomotive A1000 marine pumps on everything without issues EFI or carbed. We recently dynoed a set of Whippled 610 CID engines that made over 1100 HP and TQ the fuel pressure held steady with no drop, 3 months later they are running strong.