Thanx -- that establishes the lower limit anyway. Now if I can find out when they started using synchronizers in 1st gear, I'll have the range. Then maybe I can sell the thing, as I don't really have room in my shop for another doorstop. I had a buyer ready to go until I found out it wasn't a '55 trans, but he's doing a restoration and wants it to be correct for the year. Oh, well....