By the time you get it breathing well with good headers & a good exhust you would havre to be close to, or in excess of 550HP with that LS7.
Paul, you are obviously a man who like to push the envelope.
We've been changing cams, re-programming the stock ECU, good headers and heading toward 700HP with the LS7 SL-C my brother will be racing over in the USA later this year.
I would love to fit an LS7 to a car here.