Mark III chassis dimensions

[A.A.]

Sorry if this has been covered, I just can’t find a consistent answer. I’m having a combo cab built for a Mark III purple stripe that is in transit (7 buttons on front, reverb on back, SUS-4 mounts). I need to know:

1) The dimensions of the chassis
2) Measurements of spacing of the mounting holes.

Also, does this chassis fit into any Mark III or IIC shell?

Thank you!