Shoebox drop leaf springs with blocks

[CJStefan]

So I put 4" lowering blocks on my '49 Club Coupe but I want it to come down about another 3". The problem is with the 4" blocks and stock springs, getting the 205/75s on was a huge pain in the butt. I'm thinking of getting Jamco (St. Lois Spring) 4" drop leaf springs and 3" blocks. Are lowering leaf springs the same length eye to eye as the factory springs just de-arched or are the springs themselves shorter in length? If they droop down as much as the factory spring it would essentially be like having just a 3" block when pulling the tire off.