All it takes from you is to find out what motor size you need to put into it (I presume 540 sized motor) and then look at your options.
The Novak GTB and Mamba Max ESCs are very popular in the Brushless 1/10 world. You can buy them ESC only or with a motor. Read some other brushless threads on here too since they'll help you out. You have to read and sift through information if you want to find anything out.
BTW, people don't really reply to these threads as much since the question your asking is a sorta lazy question, and people think "This guy can find this out on his own, he just doesn't have the effort to look himself" so they don't answer.
I don't know much about the E savage since I am in the on road world usually, but I am going to guess that you want some sturdy Drivetrain parts. Again, do some research on your own part, post links to parts you are thinking about getting to improve your car and THEN ask people how they think it'll work. That way, people will be more inclined to ask your questions.
I am a man of few words.