Join Date: Apr 2005
Location: St. Charles, IL
I haven't seen anyone add a significant amount of clearance simply by "stretching" sheetmetal. Whether adding more traditional wheel flares or basically bringing out the entire panel, you'll just have to decide where to cut and section in additional sheetmetal where you want it. If you want to retain original body lines, add sheetmetal in a relatively flat, horizontal surface as they did.
The front fenders aren't as labor intensive as quarter panels since there aren't any wheelhouses to worry about. But for the quarters, you will have to modify/add material to your existing outer wheelhouses to reach your wider quarter panels, also as they did.
I'm also not aware of any pre-cut/formed metal widening kits out there; all projects I've seen have been custom with photos like TCP's link.
'65 GT350 Clone
'70 SportsRoof - roadracer STILL in-progress
'98 SVT Cobra