the current crop of repro sheetmetal is mostly made by an outfit called Dynacorn - they've gotten the original engineering info from GM and did the dies properly w/ high tech modern techniques - in the 'bad ol days' 5-10 years ago, much of the sheetmetal may have been poor, but I've seen the new TF 55-59 parts [fenders and doors] and am impressed - have heard a number of folks who've used'em say they're great - put new steps in the 58 last summer, and the quality is #1 and heavy material - bodyman next door is doing a 68 for a guy and new front and stepside fenders are excellent for that series as well - most of the AD stuff now is the same company
watch out for fiberglas fenders, mostly take a lot of fitting
Bill
