I was placing an order with Snyders - and gave Tom a call about several different things....
Here is the scoop on the Seat hangers:
Two ways to go - weld on upper clips, or screw on to the upper wood channel.
Either kit will work, but doesn't include the clips that I posted earlier in the Thread.
The earlier brackets could be used as lower mounts, mounted point down on two of the wood uprights. Assuming the weld on clips, the seat frame rests on the clips, then is pushed down to clear the bottom clips, and held in place when it pops back up. This method would allow you to remove the seat back without tools. Hope the pictures help. Snyders has the instructions posted under the part number.
Thanks Tom!
BB
PS: CAPE A - did you still need a measurement on the lower seat wood?