Remember the heads I posted images of asking for opinions? I took them to a local machine shop and they tested them. Exhaust valves and all guides were toast, so I will pick them up tuesday with all new guides, new exhaust valves and the valves installed and lapped.
Cost? US$50 for the guides installed, US$25 for the valves and US$5 for lapping and assembling.
Do you envy third world labor rates? :)
No cracks at all found in the heads...