Headwork on a cracked head?

[Don M]

No snips...
Richards in TN can fix up the heads.  I've never used them (I'm not in the US) 
but I've seen their work and it was excellent.
Valves...there are a number of firms but for something not too outrageous and 
survivability is a concern, then look at Mahle.  I believe they have a 
catalogue/brochure you can get at their website http://www.mahle.com (?).  You 
or your rebuilder can also contact Mahle in the US and they will assist in 
selecting the appropriate valves for what you want to achieve.

Don