Full Floor Pan On The Full Trunk Pan Or Is It The Other Way Around? Thats Where The Two Meet Just Behind The Back Seat, Its Right Where You Weld The Two Together. I Looked At My Old Parts But Because Of The Way I Cut Them Out You Can't Tell, And Because Of The Rust Thanks

If I'm understanding you right, you want to know if the floor goes on top of the trunk or the otherway around??

If your welding on both sides, it doesnt matter. If your welding on the inside only, the trunk goes on top of the floor that way as your driving down the road, that seam isnt a catch all for dirt, grime, etc., etc.

I'm doing my 69 Z replacing only the trunk pan (full 1 piece design) and the floor pan goes on top of the trunk pan. The arch of the driveshaft tunnel has a 3 in welded bead. Otherwise, you may run in to problems fitting the pinion bump stop to the underside.

Floor pan on top of the trunk pan.

i am just cutting mine out of a 67 and the floor is on top of trunk pan.

Here's a look at the way they were built.
http://epitomesrebuild.com/images/223.JPG