Anyone running a 5.5/7 in drop with 18'sor20's?

[tantrumpipeline]

This is the setup I'm going for with my CPP grand slam, and I'm trying to find out what the clearance to the lowest point of the truck is with 18's and with 20's, if anyone has this info or a pic or 2 with the specs (tire/rim/drop sizes) it would be greatly appreciated, this will not be a daily driver or a show truck, just my toy so I'm not worried about all the don't do it comments, just curious as to whether or not the poorly built roads here will destroy my truck with this setup or not, I am gettign the c notch and rear 5lug conversion as well, thanks for any help.