welcome to the forum
i've been so broke that i rebuilt only the one valve.
head job only is very common, but chances are the smoke out of the breather is your rings.
do the head, you don't have to pull the motor to do it.
but plan on doing the bottom end eventually.
i'd wait on the lifters and cam until i pulled the motor.
yes on hardened seats but it will cost you, if you plan on low miles per year, you might get by without seats. (i'd do them)
and post some pics, because...
