Nitro vs brushless rc engines?

im going to make a custom truggy and i was wondering what might be a better setup for mostly street drag and a little dirt track racing. 2 7.7 nitro engines each with a rb innovations supercharger and nos or two really good brushless engines. p.s i dont know what a good brushless is so if you think brushless is better please say what king of engine an both the nitro and eletrice setups will be twin engine setups on a 1/8 scale truggy chiss