From underneath the car, on a lift preferably, but good enough stands should do....but you are lying down and cannot generate the force needed to crack some bolts....
on that subject, when i had my gaskets around there changed, the bloke had to heat up the bolts and they had a nightmare getting them out....i left them to it after becoming uneasy at the site of a flame gun under my car
A 99 model should be a bit better but will have similar issues with old rusted bolts
Thanks Manc
If you dont mind my asking, what gaskets did you have changed and what was the approximate cost?