Grindng your own heads.

Well i have a pair of 1989 dodge 318 heads, i read that i can grind these my own with a dremel, for better performance. I am EXTREMELY mechanicly inclined so if its possible most likely i can prolly do it. so i would like to know if anyone has done this and can explain.
my other option is selling these heads.
so any help would be nice:)
Author: admin