Next question - what about the crank itself?
I'd like to take it right out of the block so that I can clean out the oilways more thoroughly and then change this bronze bush thats causing the leak.
I've taken out the bearing carriers from both ends, and the cranks is detached from the conrods but I can't seem to wriggle the crankshaft out of the crankcase.
Is it even possible to remove the crank without taking out the piston/conrods??

I don't really want to remove the cylinder head to get the pistons out because the job is expanding too much.
If its not possible then I'll have to do it "in situ".