Mine's only running 190 horses and it's plenty fun for me

The thing you have to realise, is that you've got an old engine in there, and pulling it apart may give you more grief then it's worth

My spec is : Mongoose exhaust, hearts and diamonds ecu, k&n, samco boost hoses, bleed valve, cts box, ap organic clutch, 18psi 190bhp 196 lbs ft tourqe. Not bad for 140k on the original standard block and MFI management