On a few M62 engines I could get all the bolts off using my "Dr Seuss" ratchet.
It was definitely a challenge to get to some. Some I reached from under most from above but beats taking off the header.
Caveat: when installing likey to be some pent up stress on the exhaust you'll need to overcome to get the head aligned onto the alignment sleeves.
You can likely just use a prybar to push. I used a floor jack under part of the exhaust to help position the exhaust header but also a rescue pulley hoist to pull the head over once a couple exhaust bolts were finger tight.
I put a 15" adjustable wrench into the tow eye in the bumper so I could pull on something attached to the car (I didn't want to use something that would pull the car off the jack stands).
This worked great. The other guy helping already bolted on the header with the head not aligned. I didn't want to undo and redo the 8 header bolts so I used some muscle enhancer to pull the head over. Worked fine. I think I used a shim to hold the head up to protect the head gasket while moving it over.