www.dropndrag.com but yoy really ough tto think this out cause basic every truck is differnt but the thery is the same
I belive you cut have way up the fire wall and remove a section there and splice it back togher and o yah you need to cut teh floor free from the cab and make braket or panels to fill the gap from the rockers to the floor pan
this is just a ruff explantion much and I do stress much more is invovled I would basicly do it off the truck and double the triple measuring system