Thanks to all for the info. and measurements. I got lucky and found a seat out of a 1955 here in town. There is 5 inches difference in the width of the seats. (No wonder I couldn't install it.)
I already got it back from the upholstery man and put in the truck. I can drive it now!!
Since I was at it, I changed the color scheme from white & gray to turquoise and gray. Turned out beautiful and no white to get dirty off the seat of my pants!
