best to pop it on a dyno, with those timing figures on a slow ramp you will find it will knock quite abit around 3600~4000rpm (assuming that's your peak torque).
I like to ramp the cars I put on dynos around 9km/k per second.. i.e. the car increase 9km/h each second... the shorter the ramp, the less stress and usually shoots up higher numbers.
I prefer to really load up the motor and let manifold glow.. think about a track, especially the straight at wakefield it's not a 400 metre straight it's quite long, thus more load on the motor