Building a Full Truck Frame that layes a stock floopr body drop

Hey guys I am building a Full frame that layes a stock floor body drop on my 02 Silverado reg. cab short bed. I was wondering if anybody had any experience with building them if they could give me any advice or show me links so i could get measurements or any "How To" stuff. Any info would be great appreciated if you have anything that could help me please contact me at Needs2bcustom@yahoo.com Thanks