Model A rear spring removal

[firetique57]

I just bought a Model A chassis that I'm going to fix up and build a roadster pickup with it. The rear spring shackles both have a broken bolt in them and I want to drop the rear end to repair this. I understand the spring has to be "stretched" to facilitate removing the shackles. Is there a way to do this without having to purchase a spreader for a one time use?