Be sure to get a piece of EFI high pressure hose rated for inmersion and replace the factory fuel pump pulsator with it.

The marine setups support and feed alot more powerful engines than the road going setups.

One marine 350 I know of had L98/ZZ4 heads on it and was rated 315 HP with TBI feeding it. There was...

They run at higher pressure because they sit in a 454 TBI unit and feed 280-320 HP engines. Even the Marine 4.3s had a big block TBI on them making 210 hp.

I am guessing they are this part number?

25170301

Although they could just be normal 350 truck injectors. I ran a pair at up to 50 psi for thousands of miles. That was 20 psi base fuel...

You need to add one to your chart....Its a marine application high pressure version of the 61 lb/hr injectors. Used on 400+ HP marine big blocks.

25170301----Yellow/Black---61 pph @ 13 psi /...