Help With A Seat Measurement

I need someone with a 73-76 Duster to measure the distance from the roof sheetmetal or headliner, which ever you have to the surface you sit on. I would prefer a stock bucket seat, but a bench will work.
Every time I get in my car it seems Im sitting way to low compared to a stock seat. Now is the time for me to make the adjustment.
Thanks again
Andrew