is it the n/s or os rear?
I found it easier to remove the alloy bracket from the block, then access is a bit easier.
Put a block of wood on a trolley jack under the sump, DONT lift engine with it though, its just to support engine while you work, The other way is to use a scaffold pole cut to fit on lip of inner wing and a sling/rope tied to the lifting eyes on the head.
plenty of wd40 if the bolt is rusted up.
woody