If the seats are all the way forward is there a solid 8 foot 1 inch of space even at head height while seated in the van?

Are the sides of the van wide enough for 4x8 sheet even at head height in the van?


I'm assuming the sheets fit between the wheelwells on the floor.

I do not currently have an astro van. I am looking to get either an astro or an s10 and i'm still researching which will better fit my needs, and this is one of my key questions actually... How high can I stack 4x8 sheets in the back? Can I basically go up to the ceiling inside or not? I'm aware of ...