Welding Unibody Seams?

[RIGGATONY66]

Thanks for the replies, I'm making notes. Never know about the firewall flex. That's information that is great to hear about. I can plan some welding to support up that area. I'll get some pictures up shortly.

[Mark Ugrich]

With clutch pressures in the 200-300lb range I doubt firewall flex will be a problem.On my own car, once I put an updated clutch in it, the overcenter spring would hold the clutch pedal to the floor. I agree adding a full cage would be time well spent.Good luck with your project.

[Run to Rund]

The factory pinch welds are very strong. I doubt you would gain any strength, and otoh you will burn off all the paint and rust resistant coating inside. As others recommended, install a good roll bar or cage for stiffness.

[Lew Silverman]

If memory serves correctly, the front suspension on the early Chevy ll/Nova bolted on to the firewall, so anything you can do to stiffen up the uni-body would be beneficial. There are a number of companies that offer after-market (tubular) front suspension kits for the Chevy ll, with upgraded springs, shocks,steering and BRAKES! That and a well designed roll cage should do wonders for your performance.

Good luck with your project!

Lew