Norbs,
I have a set of stainless Ferrea exhaust valves. 1.625 head, 5.500 Overall length, .290 tip length. The set has 7 used valves and 2 brand new valves. A couple valves show some slight pitting on the underside of the head, but there are enough valves to make a great set.
I ran these with a Comp 947 triple spring and Comp retainer. The installed stem height worked great with the T&D rocker system.
I also have some Manley titanium intakes 2.02's same length if you are interested.
I completely rebuilt my Aluminum S2 heads a couple years back because of exhaust seat problems. I replaced all the seats with Martin Wells "Welltite" seats and new Ferrea valves. These valves are the take outs. Nothing really wrong with them, I just wanted to go back with all new parts.
Dave
One more thing, the exhaust valves are all reconditioned, cleaned and ready to install.