
As a premium member You should upload your photos to CK5.com so members can see them as a loaded photo than as a link! Go to the Shooting Range too. Some cool stuff may be there as well.I have a few methods in use on my squarebodies. The K30 383 truck has a blower hat to 3" tube, to a 90* into the maf and air filter.
The 73 K5 has a Cadillac intake bonnet on the tbi into the maf then into a Ford airbox with k&n inside.
The 75 K5 has a factory 5.3 airbox with 4" aluminum tube between the throttle body and airbox
my 90 suburban had that set up- got splashed a few time and was effectiveI run this same stock air intake system on my 1991 V3500 crew cab with TBI. I like it because the air intake tube is connected to a built in a drainage system in the radiator support core that GM built into it, which restricts water from getting sucked into the engine and hydraulic it.
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So, from the picture only, doesn't it appear that this housing would restrict flow into the air cleaner to only the spots that are directly inline with the 2 openings? There doesn't appear to be enough clearance around the entire air cleaner for the whole element to flow air, but I don't have dimensions, just estimating based on the distance of the outer ring where usually contacts the element.
If you can get fresh air from outside the engine compartment, and not restrict it, it should only help. However, results will vary because of so many factors that can become restrictions, etc.
I've thought about it too, but I don't think the cowl is deep enough to let the hood open.