I have a 73 racecar project (coupe non-hatchback) with a rusty trunk pan. I am converting the rear taillight panel to the 68-9 panel and I now need to order a trunk pan. Will a 68-9 trunk pan weld in place of my 73? I am also going with a fuel cell and a 68-9 bumper.
The rear frame rails are the same as well as the drop offs and extensions. Since you are using a fuel cell and not a stock gas tank it should fit in with little to no modifications. The big issue is you can not lay the new pan over the old to get a feel for where to cut. You will have to play with it and take your time.