In the effort or real research on the topic, and being that I have an oil pan off the car and hanging around, I could check to see where 6 qts of fluid would come up to in it. However w/o oil filter..we'd need to make an assumption.

Overfilling is not good practice no matter how we look at it.

In an case where we continually attempt to have our cars run better etc... instead of overfilling or flushing.. how about looking into a way to drain the last 1/3 qt out of the oil pan? My solution consisted of swapping out the pan for sealing and drainage issues I wanted to try and solve.

I can do a test fit, but my bet is it will be slightly exposed. However, this isn't really a daily driver, and I plan to add a skid plate to protect it. I'll need to add another one for something else at the same time anyway.

A stock PF47 (OEM) filter is roughly 3" long by 2.75" in diameter.
A K&N HP2001 (sold at INTENSE among other places) is roughly 5" long by 3" diameter.

Forgive me for the angles, I needed another person to shoot these pics:




















Bottom line is that it IS exposed. There is a chance you could take this sucker out with a road hazard or a deep pothole.

I'll probably fashion some sort of skid plate for this one when it goes in. But in the long run, the Zilla isn't a daily driver except in the late spring-early fall timeframe. Not much inclement weather or bad conditions.

For most 87-99'* here? Probably not a great idea.