I have converted three 1/8 scale truggies and the same number of buggies. I also own several nitro vehicles. I started in nitro and moved to brushless power because of the power and ease of maintenance of brushless systems.
Check out some vids of my conversions.
http://www.youtube.com/watch?v=QnwpWq7kynA
http://www.youtube.com/watch?v=x4SeWaYax58
http://www.youtube.com/watch?v=SuqbM7zR8aM