brushless revo how to ?'s

looking to build a brushless revo but am curious about the motor mount sold on here does this retain stock revo trans

I am still really up in the air as to wether I want to go brushless revo or brushless savage looking for a great bashing truck and have been told both are good ways to go

Looking to run a mamba max esc with fiago 8xl or is there another esc motor combination in the same price range i should consider