drop leafs

my friend and i have 96 and a 97 s-10 blazer. we both have the same bag kit. the rear end is monoleafed and it has behind the wheel axle brackets. we were wondering if we bought the 4" drop leaf from airgasmkustomz.com, if it would drop the backend at all. let me know if it will. and how much lower do you think it will be.

thanks