What do you consider very low? 5" is not going to get you very low. Why not start with a flip kit which would retain the factory ride? Your options are limited to drop leafs, flip kit and shackles. You can use shackles with the drop leafs or flip kit but I don't think you can use a flip kit & drop leafs. Drop leaf & flip combined would be too low without a notch and not a good idea for static drop. Are you going to c-notch the frame? Hard to go very low without a notch.
Here is a good write up on a lowered leaf spring truck that utilizes a flip kit:
http://67-72chevytrucks.com/vboard/s...d.php?t=577529