I don't know where you found all those NOS parts but being able
to gather up all the parts to build a fresh brand new head is
quite a feat.
I don't see anything there that couldn't be cleaned up with some
wire brushing and WD-40/scotchbright pads.
There is no need to replace the guides, the original valves are
just fine, most of them lasted 50-60 thousand miles in the
original engines. No need to insert hardened seats the stock
cast iron is fine for 50-60 thousand miles also.
If it were me, I'd do just as you suggested and run a wire brush
thru the guides drop the valves in with a little Clover lapping
compound and see what the seat looks like. It should give you a
fine even line, you want about a 1/32" to 1/16" on the intakes
and about 1/16" to 3/32" on the exhaust.
Other than that you should have a head that will run for a good
many years with out any trouble.
Denny G
