I also thought it was a little overkill but I welded both sides because I wanted it to look cleaner. I also mini tubbed and moved leaf springs into the frame rails last winter. This fall I replaced some of the trunk floor and cleaned off the sounddeadener on the inside quarters. I wanted to sandblast and paint the undercarrage but it now seems a little to cold for putting on the Zero Rust since it has to be above 50 to use it. My next big jobs this winter are to replace the lower rear quarters and fill in the trim holes down the side of the car. This pic is of some 325/50/15 drag radials that fit in the tubs nicely now. The car will be sitting a lot lower than the pic shows though. Did you do any work to your 66 yet.