Hello, I am waiting for my 70 Camaro to return from the paint booth, hopefully the salt will be off the roads here in Salt Lake before it's done! I have had several of these second gen camaros, set up for canyon and autocross duty. They have all had a problem with a crack forming along the quarter panel line behind the drivers head. The shop welded the seam, but I am looking to stiffen things up further. The car has sub frame connectors welded to the floor all the way back, and a roll bar welded to the frame connectors and body behind the doors. I am looking to put a door bar from the roll bar to the firewall to help. Will a 1 1/4" bar parallel to the door sill( at about a foot off the door sill), welded at the front to the floor and firewall help much? It's still a street car, so I don't want the shoulder high to floor door bar of a race car.

Thanks all, Tim