replacing valve seals

[Chi-Kai Chien <chikai@hera.ICS.UCI.EDU>]

I'm finally going replace my valve stem seals; I was wondering if
anyone had done this before (81 4000 5 cyl) and could lend some
pointers.

I was planning on inserting some rope into the spark plug hole and
compressing it by turning the crankshaft in order to hold up the
valve.

Specific questions:

Is any special tool needed to remove the camshaft, i.e. any bolts with
funny heads?

Do I need a valve spring compressor or will something else do?

Does removing the valve stem seals and placing new ones on require a
special tool?  (the shop manual gives a tool #).

Anything else I need to prepare for?

thanks,

chi-kai