DIY floor pans.

Ok so I have formulated a plan. Looks like I'm actually going to take @j par advice and I'm gonna cut the panels from that old lumina I need to scrap. I measured out everything and I have enough to do the whole passenger side and the drivers side front pan. So here's the plan. I'm gonna cut the shert metal out of the lumina first then cut them oversized to where they need to go, iv already made all my measurements for the places I'm cutting out I'm making the repair panels 2 inches bigger in every direction that way i.will have one inch of hangover to weld to. After I get them cut I'm going to rough shape them with the existing rusty floor using heat 2x4s and a BFH! Once I get them close I will take them out and one section at a time cut out the old weld in the new and once the new is in I can continue to beat on it and get the shape desired. Wish me luck. Once I get started on it I will create a new thread with the project that way if anyone else wants to try it they wont have to filter thru 6 pages to get to the good part lol. Thanks for all the help guy I really appreciate it.
If you even get it close it will be amazing what the carpet will completely hide like everything! LOL...