One more snag --- the "new" rear u-bolts that I ordered don't fit the springs properly. The '46 had a forged, flat top that made full contact across the top surface of the spring but all of the new replacements I have found are "bent" with a big [censored] radius that only contacts the edges of the springs. They call'em flat, but they are not. And so far, no one I can find has anything even close to a proper fit.
Has anyone else run into this issue? Found a solution?
There are comparison pix in my Flickr Album...
Album https://www.flickr.com/photos/tango88/with/15618469700/ 
