Are you talking about the one that sits on the centre black bracket in the photo below? If so, I don't think it'll be a piece of cake. I changed those when I changed my engine, which of course made it a piece of cake.
Off the top of my head I'd say the easiest way to get at that is by removing the starter motor which should??? give easier access to the cast alloy bracket which seems to be secured by two visible bolts. Of course, it may be possible to get at it below without removing the starter, but I wouldn't put money on it. Either way the engine is going to have to be supported.
I've enclosed two photo''s from my engine change so you can see what you're dealing with.
Dave..
