Perhaps the best way to record would be to mount a remote mic on in the back of the SRT some place - perhaps on the licence plate bracket.

You don't get the true sound of this mod until you open it up on the road.

The SC doesn't engage when in park or neutral so revving at stop won't give you the true sound.

A dive by clip will only give a brief moment. OR you could record from inside the car - in truth that's how you will always hear it anyway.

But the best way is to go for a ride with someone who has done this mod.