RE: Which hop-ups should I get for my Nitro Rustler???
Well, A pullstart will help make your truck MUCH lighter. You could also think about changing your gearing. I have found up to a 24t CB and a spur as low as 64t.
You could get carbon fiber parts from RD Racing Products which would make it stronger withought adding the weight of aluminum.
You can increase your nitro content to 30%