What Fuel/Water Separator to get??

[RAGS209]

I'm looking to add a fuel water separator to an old (but in excellent shape) 1978 Cobalt Tri-Hull with 225hp OMC Sterndrive. The boat also has a new Suzuki 20hp outboard motor installed. The logic for the separator is to split the fuel line into 2 and also add extra layer of filtration the boat does not have now. Will also add a shut-off valve after the separator to each engine so one engine doesn't suck air from the other. It will be mounted in the engine compartment - not sure if that matters as I couldn't find any info about location for mounting.

I am looking at this model but want to know if there are better options available that I'm unaware of. Google searching for the best option leads really nowhere..
Sierra International 18-7982-1 Marine Fuel Water Separator Kit, white

[Krob1114]

I'd like to see a picture of that engine configuration. I'm having trouble picturing a stern drive and an outboard on same boat.

[RAGS209]

Have you ever seen a trolling motor attached to a boat beside the outdrive? Same gig.