I Just installed the Hellwig on my 99 3500 a couple of weeks ago. Other than I thought there instructions kind of sucked, could hardly read the small print on some of the pics, etc. I ended up using the stock inner frame brkts & bolts, they were bigger & easier to keep in place. I think they could have sent larger bolts & longer would have been better.
However after all the PITA installation, I can say that it was definitely worth it! Made a big difference hauling my 1050S over the stock bar. Sorry about all your hassles, apparently I was fortunate to at least get the right parts in the box!