Originally Posted by carolines truck
''''''I see he used thumb screws to secure the top of the seat back to the frame.''''''
actually someone else came up and did a one handed lever/slider (on drivers side) to a long bar that holds the seat in two (or the same locations as shown)

I have not found pictures of the lever, do you have a link?

Thanks,
Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-