Reply to "Pantera Front Cut"

I got into this thread late as usual. Larry Stock hit a hump-back bridge at 150 mph in his street '73 during a Silver State open road event in 2006, and BROKE both lower front subframes clear off the tub where they are factory-welded. The uppers were OK. It happened nearly at the end of the run, and a checkpoint worker paced off some 135 feet of 'air time' from the scrape marks he left past the bridge. He runs and sells an elaborate bracing system in front and back that extends some distance from the wheels and requires welding to install properly.
Larry (with a navigator-friend on board the whole time) proceeded to drive the Pantera home some 135 miles at more-or-less legal speeds. It wasn't until later the next week before he noticed some 'looseness'and put the Pantera up on a lift for a check....
I suggest not concentrating your chassis efforts just between the wheels; there are other areas that merit study for stiffening, too. IMHO, seam-welding the entire car is best, replacing all the flexy spot-welds.