Wize - I found that the torque curve stayed similar - all had around 560 fy lb peaks, but they moved up as the cam / head / intake setup went up.

My testing was more focused on the 3 big players, as opposed to singling every little item out. The stock heads, with small cam, and stock heads, still made 560 ft lbs, and IIRC most were all 500+ ft lbs through the entire pull.

I wonder if it's splitting hairs at that range, but the torque curves definitely moved up as the hp went up. We pulled it a few times to 7200 with the big setup and man.... there aint a sound better!