Sounds to me like there's a good backstory to this swap.
Mount the filter any which way that will make access easy. If you're doing all this work you can certainly reposition if you have a problem.
Not really a exciting story...been a fan of the motor. So I decided to swap it in. Taking my time (only started over a year ago).
Car was originally a 229 semi-odd fire v6 car. Played with that for a while, decided I was going to rebuild it and prep the motor for boost, so I yanked it out. My friend pulled a 267v8 out of his wagon, so I bought that and slapped it in with a cam and valvesprings along with a 4bbl to keep the car mobile. Well...I ended up slapping together a "backyard" turbo system for it with stuff I had laying around, fully expecting the rods to vacate the block within a month. Well after a year of abuse, it still never died. Sold the combo to a friend after I gathered a sc400 parts car along with an additional JDM engine and began the madness.