Hi, I'm looking for some help from body experts: I started working on a '72 911 Targa that I got with the floor already removed by the PO. Trouble is, after all those years the body flexed and there was a 1'' gap when fitting the Targa top. So, I built a small jig using square tubing, bolted it to the floor, and then "pulled" the chassis onto it so that all the measuring points (front suspension, torsion tube, engine mounts) were factory spec. Then I banged on it a bit and welded a cage inside to keep everything in place (and it still is). In addition to this sag, the chassis also had some twist in it. The sag did not require much force to pull out, but the twist was more resistant and a little +- 3 mm could still be there.
I'm now almost ready to weld the floor pans back in, but I have a horrible thought: I'm worried that when I remove the steel reinforcements (after welding all the floor, rockers, and rear panels), the chassis will spring back and make all this work useless. Does anybody have any experience or ideas on this?
Thanks for any help, I'm really worried!
Dario
PS, restoration thread with jig photos are here:
That's it! my first 911 restoration thread- '72 911 S back from the grave (maybe)