[jonzcustomshop]

if your heads are still on the motor ( I assume they are , and you just pulled the intake to change the lifters) do a compression check before you get any more time and $$ in the motor, make sure it is worth fixing.
If your valve was stuck, make sure it can move before you fire the motor again, if it is bent and stuck in the head , you will just break the lifter again with the new cam.
your compression test might show other problems with that cylinder.

hopefully some one a little more mechanically inclined than me will post in with some good hints.

even though you feel that you over paid, there are a bunch of things about it that make the value, that would be expensive to do, the 4 speed , aluminum heads, tach, short box all drive up the value.