How low can you go? (with a spring over rear)

I realize there is a major restriction in using the stock Model A spring/rear suspension, but I thought I'd ask here to see how low you can really go with modified stock style stuff before I go hacking up a stock frame to put the spring behind the rear axle. I have a spring behind on my Coupe, so I know you get 'em real low with a spring behind, I'm just thinking about the style of the next build.

Thanks guys!!

 

I think 2 guys on here have gone with a 7 pack roadster spring, the top 3, cut down and moved to the bottom. Both were on Model A roadsters. Both bottomed out when they settled in.

 

What about a model T spring i think sit a little lower.