Cobranut1

I have a Powerbond pbu1480ss10 10% underdrive damper.
I need to make a spacer to mount a trigger wheel to the front of the damper, but it's difficult to accurately measure the spacing of the 6 bolt holes.

I'd rather not remove the damper if I don't have to.

I haven't had any luck finding the dimensions online.
Does anyone know the bolt circle of these holes?

https://www.summitracing.com/parts/pbb-pbu1480ss10

Thanks,
David