Engine fuel pressure regulator or fuel pump?

Ok General, 5/16 it is. Thanks for that.

And yes Onefine, I have a GSS340 on order. 11 years ago when I ordered a Walbro 255L pump, the vendor on eBay sold me a high pressure pump that turned out to be a 307. At that time I did not know the difference, but after installing it I found out that it draws more amps and pumps less fuel under pressure, so I am happy to have to replace it.

Thanks for everyone's help.

I received the new parts yesterday and installed them all.

I took the car for a rip today, and it feels excellent.

I have one question for those that have replaced a fuel pump before:

There is a red rubber cover that goes on the fuel return outlet on the pump hanger bracket, and appears to spread/smooth the fuel flow more evenly when the fuel returns back to the tank.

I am guessing that it would be to prevent aeration of the fuel as it sprays back into the tank?

When I assembled the new fuel pump and hanger bracket, I could not find the replacement in the kit I had. The old one was brittle and torn so I could not use that one.

I installed the pump bracket without this rubber outlet piece in the fuel tank.

Today, while sweeping up the garage, I found the new rubber piece under the work bench.

So, my question is how important is this seemingly insignificant item ? (I really don't want to have to R & R the tank again in this lifetime unless it is of the utmost, critical, importance)

I have included pics below of the rubber piece, and where it is installed on the pump hanger bracket.

Thanks,
Matt.

Wouldn't the fuel going through the pump keep the pump cool ?

Plus if the duckbill was bathing the pump in fuel, wouldn't the electrical connectors get sprayed too ?

The bottom 75% of the pump is below the fuel level.