im doing a project for my auto tech class at school. so im gonna get a set of sbc heads from a junk yard and rebuild them. im wanting to rebuild a set of heads that are maybe "desirable" by many, and then see if i cant resell them to get a little money back. or if not, i think itd just be fun. so any ideas on what heads i should look for?? what about the "camel humps"? and what about casting numbers so i know exactly what im getting?