Thanks BIG. I'll have to look close to see how far down the crack is. The pin goes all the way through the boss, so getting it out is as simple as driving it out from one side with a pin punch. Then is the fun of getting out what's left of the broken stud.
The head is worth the expense. '62 409 hi-perf.
Hopefully the valve seat replacement won't enter more problems (water). The rest of the valve is still help in by the retainer and keepers. It should just fall out and hopefully leave a good guide.
Verne
edit: The broken valve is an intake but the broken stud is the exhaust. I'll also need to correct this:

This engine was built (I was told) by Dan Jessel in '62 when he was working at Duffy's in Red Bank, NJ. It's a complete A/S spec engine so I'd kinda like to fix it.