E-Body bucket seats in A-body

I might be interested in swapping a set of B body tracks for a set that is shorter.
I have 72-74 B bodies and I'm really tall in the spine, and I need the extra inch of headroom!

The tracks I have look awfully short, though. Can't imagine where they get an inch from.

Take some pics next to a ruler and I'll do the same. Might be a few days...