Rear of alternator spacing measurement request

[Raxephon]

This is for anyone with a VH45DE outside of the car with the factory header & alternator still attached.

How much, if any, space is there behind the alternator?

I'm curious since moving the alternator rearward, if possible, and swapping on a different pulley for it would free up a slot on the crank pulley.

Freeing up a slot on the crank pulley would provide a slot for a supercharger to be driven off of.