I drain oil from the bottom like I think everyone should. I always put in 8 quarts, I quit putting in 8.5 back with my FIRST oil change on the FIRST Roadster - cause I'd get the high oil alarm in curves.
The last think I'd do is overfill this or any engine. Keep in mind that you can run these engines low on oil without damage but again, overfilling is never the right thing to do.
Now the astute reader reads the comments in threads like this and wonders:
"Do the oil change places concern themselves with the obsession that these guys do, I mean, over OIL?"
I once took mine (with MY oil and MY filter) to Jiffy Lube and I can tell you the answer is NO. They didn't even change the filter or the o-rings - when I got home I took the filter assembly out and could tell they'd not changed it. I went back to the JL, walked into the bay (wiht the kid whining I was not allowed there) and pulled my filter out of the trash, still in the box.
Anyway............
Q: Did you say I can run it low on oil?
A: Yes, Read the owner's manual.
Q: Did you say it's worse to run it high on oil?
A: Yes, Read the owner's manual:
So there you have it, up to two quarts low? Keep driving. Overfilled? Drain it out.