You can find a good comparasion here
http://virtualindian.org/8techcams.htm
If you want a modern grind of cams you'll find it here http://www.performanceindian.com/TechTalk.html
http://www.performanceindian.com/Tuning.html
Don't forget you need a good set of springs. I used some bad new ones and I suspect that was the cause of seats worn down in short order!