How much do you plan on dropping it?
If you stick with the I beam axle in front the best way would be to get a dropped axle. You could also have the eyes reversed on the springs to get a bit of drop.
On the rear if you want to go really low you would have to put the axle on top of the spring. Then you would need to C-notch the frame for clearance.
I've seen a few front axles put on top of the spring. It isn't hard to do but you could end up with the springs too low to the ground with low profile tires.
Low profile tires like 205-60-15 on the front and 245-60-15 on the back will bring it down a bit and get the stance right.