Crosswind Intake manifold question again!!

I am gathering parts to build 2 small blocks to put in a boat, I have 2 5.9
magnum motors that I want to use but I need to use the LA timing chain covers to mount the marine water pump and fuel pumps, I know about the cams being different, but I can take care of that. My concern is the fact that the Eddy air gap intake for the magnum does not look like the bypass hose will work with the LA front. That leaves me with the crosswind, but I've heard of issues with them, are they really that bad? I plan on gasket matching them to the heads anyway, but I'm worried about porosity. Real numbers, how many people have had a problem with them? I know they dont work with the serpentine setup but they seem designed perfectly for my application.