1936 Special seat question

[groselle]

The front seat cushion in my 1936 Special sedan is rapidly disintegrating so I've decided to try my hand at reupholstering.  I at least want to get it so that I can drive around without it being a literal pain in the rear.  I have carefully disassembled the old cushion and sewn a practice cover.  My question is how far do I compress the springs when attaching the cover?  Does anyone have a 36 with original or new upholstery that could measure the distance from the bottom of the cushion to the top along the front edge (see pictures).

 

Here's a picture of what was left of the seat and my amateur attempt at a new cover.

 

 

[JFranklin]

I usually invert the spring/ padding combo on the floor and place a piece of plywood on the backside. Then I kneel on that while I hog ring the cover in place. I have liked the results.

Edited February 27, 2018 by JFranklin (see edit history)