sounds about right mate be awear that the barra turbo motors are roughly ratted to around 330rwkw before some serious stress is put on the conrods and valve springs. some people will say you can push them to near 400rwkw but I wouldnt be. if I was you id be changing the valve springs and conrods sooner then later. hit up the guys from ATOMIC MOTORSPORTS for all the good stuff. there really helpful. currently building my new barra long motor