More IVA prep! Noise and self centering

[skov]

I whipped the car out of the garage yesterday to do some IVA prep.

Tested the noise level and I'm getting 105 dBa under IVA conditions (2/3 max RPM, 45 degree, 500mm away). This is using an expensive properly calibrated meter from work, so the reading should be spot on.
Anyone got any quick and dirty ideas how to get it down by 6 or 7 dB?

My other issue is that I don't appear to have a shred of self centering
I'm not sure how IVA man tests this, but I couldn't notice any driving up and down my (private of course ) road.
Does anyone know how it's actually tested, and possible fixes? Preferably ones that don't involve making new wishbones!