front seal can be done in truck, the rear will
require dropping the trans or pulling the engine,
the rear main is a one piece type, and there is
a rear cover it fits into, I think there are 6x10mm
bolts that hold the cover on, and a gasket behind
that, you are also going to have to remove the
clutch and flywheel to get to it, so have an impact
available to make removal of those bolts easy.
Sorry to be the bearer of bad news, there is no easy
way to change the rear main seal. Keep the orientation
of the flywheel and the related parts where it bolts to
the crank, those bolts are not evenly spaced, but it's
not obvious either, one bolt will be a thread off, and you
will curse the day you pulled that thing off if you don't mark
it with something.
Good Luck
Wild
PS for a plane ticket I'll come and help you
