I have one of the classic hot 4s where they have supercharged a liberty. Thats what first got me interested their findings were that it didn't give it as much power as a rex but its driveabilty was amazing. that was over 6 years ago and all they had done was fit the supercharger plus chip. I have a mechanic mate in Darwin who has built himself a 240 kw plus liberty rs who is doing all the research for me . Want to build something a little different Thanks for the input all information is greatly appreciated.