its not too bad, rear exhaust manifold can be akward to get to unless you go
underneath and disconnect the manifold joint from the downpipe, then remove
the head with the manifold attached....it looks worse than it is...
you will need a head gasket set.and new head bolts (i think from memory they
are stretch bolts in these,)
dont put it back together without having the head re-surfaced, it should
only cost around ?30 - ?40 from a good machine shop, shouldnt have any
problems with cracks etc, its an alloy head so more likely to be just
slightly warped.
just remember the machine shop may well charge you for removing to camshaft
etc in order to close all the valves..they cant machine it with them open so
save yourself a few quid and do this yourself.
dont forget to fit a new cambelt, dont take a chance with the old one..once
it has been disturbed always fit a new one.
good luck.