I know it's a Ford & all but some good math here too...
Ford, Galaxie, Mustang, ram air, Thunderbolt, home made
www.dazecars.com
been done a long time ago
could do it with a big oval fresh-air cleaner like the Ramcharger or Air Grabbers had
pipe/ducting ( alum. 3"-4" pipe) it into the
fresh air unit/'air-cleaner',
from the inside headlight buckets with a bell behind a screen
& use a piece of aluminum or thin steel to go around the outside of the base & top
still be able to use a filter in it for street driving, take it out for at the track & have a real ram air effect,
like the old Thunderbolts did, just better looking
I thought about doing that but I have a 6bbl scoop it's not needed
but if I had a car with a flatter hood that's how I'd do it
if any of that make any sense,
not photos just **** in my brain I never did build
use the top & base & a flat piece of thin steel or alum
with simple 90* angle tabs attached top & bottom & use dzeus fasteners
maybe to attach it around the exterior, so it is still serviceable
you could still run an oval air cleaner on the street
I was going to use a 3" K&N