ok the 2 front nuts i have got undone but the back 2 i cant get on

someone said if i remove the top alternator bracket i can get on the front nut is that right ?

how do i get on the rear nut tho at the back ? the exhaust downpipe is in the way

also how do i get the studs out of the back of the turbo that connect the exhaust to the turbo ?

any help greatly appreciated

matt