Is the windsheild and back window currently removed?
If so, Yes.
Lay it on it's back.
Be careful with the cab corners.
If the windows are in ,
You could brace it upward off the floor thru the door openings.
Depending on how much floor work you have planned to do?
You should think about braceing the cab.
Check out member May70's you tube video's.
He covers all this.
3 parts to floor pan replacement and others about rockers and other area's.
link:
https://youtu.be/5ysUL5ZKtFk?t=5
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