No it's doable with the engine in the car but not fun...They're all 10mm bolts and all are easy to get except the last 3 or 4.
You'll have to loosen and remove the nuts holding the motor mounts in and either jack up the front of the motor or use a hoist and raise it up to get to the last like 3 bolts at the front of the pan. I used my floor jack with blocks of wood on it, make sure they are skinny enough to clear the sway bar and crossmember but make contact with the upper pan just behind the crank pulley.
I've had to do it twice and am going to have to do it again b/c I broke the last fucking bolt, BE CAREFUL with them, I broke it not even trying to tighten it down that hard with a 1/4" ratchet.
Also the last time I did this I jacked the motor up so far the mounts came out of their saddles and I had to use a hoist to put the motor back in properly no biggie but if you don't know someone with a hoist, it's something keep in mind and watch for.
If you do it, and come up with some easier ways to do it, let me know I'm not really looking forward to doing again.