building my own frame, crossmember drop & z, or just z?

[bagged01extcab]

I'm starting an 84 swb project. My plans are bagged and body dropped (maybe to the doors, but at least to the rocker - pinch weld) on a custom frame to lay on 22's. I have an extra frame and crossmember that I plan on using for the crossmember and mock up. I have been trying to figure out if I should just figure in enough "Z" and leave the crossmember stock, or do a combination of crossmember drop & "Z"? What's everyone's opinion on this?

Thanks
Trey