Need some dimensions...

Well, in my opinion that is a band aid fix. I understand being on a budget and all BUT if you're gonna park it for the winter why not save up for new springs OR you can add a leaf.

I know that doesn't answer your question but those shackles will change the geometry of your suspension and can affect the handling of the car, not to mention possible pinion angle changes.

Is that your car in your avatar? If so the stance looks pretty good to me.