Rear sits too high

[focusedontheprize]

So I am getting down to the final stages on my '49 Chevy. However, this past weekend I was curious on my ride height and went down and took a measurement. From the bottom of the wheel opening lip to the ground I am 26 7/8". I am shooting for a 23 5/8" stance. Here is the current setup:

- Stock frame with no C notch
- Stock leaf spring (removed 2 leafs per pack, but also ran polyliner in between the springs)
- 3" lowering blocks
- 245/15/?? wheels (off a 02 Mustang). Not the wheels I will be running
- Planning on running 18x8s out back
- '97 Ford Explorer rear end

I want to go lower, however I do not want to C notch the frame at this point. I was planning on running air shocks out back (I do plan on putting the trailer hitch back on and using it).

My question: Can I go lower without causing problems?
Can I achieve the 23 5/8 with a) C notching the frame and b) having to remove springs?

This is my first truck (rat rod) build so I am learning as I go. Thanks.

JM