There are quite a few more than just 2 that have done a spring over axle conversion. Either way, you have other leaf springs available to you. You have Alcan and Deaver out there or you could have a set made locally if you find a decent shop.
keep the drop bracket and spindles, go with a longer coilover in the front sway away or radflo and ditch those spacers asap!. and go spring over axle in the rear and keep the stock leaf pack. you would have a badass set up