Why do you think you need those replaced?
Cracked? Want to upgrade to a 2 bbl or even a 4 bbl? Something else? Get it running as best as it can run on what is there now 1st.
I have a couple of sets of 1bbl manifold "stacks" laying around but shipping would kill that idea
See if anyone from the site lives close enough for you to meet up that has what you are after.
And valve guide seals can be changed on the car without pulling the head. Been there done that.
Parts would be cheap, buy you do need access to a good air compressor
And the right kind of a valve spring compressor.
