I've used Goodmark--they're fair quality but nothing to write home about. Paul is dead-on. NOS or good used is always better than aftermarket. The headaches can be endless getting stuff to fit right--especially sheetmetal. For example, my Goodmark fenders did not fit my Goodmark doors at the gaps and bodylines. The doors had the window cam adjustment slots punched 3/4" off from GM doors and I had to grind them to make the windows adjust right. If I had it to do over again, I'd have patched my old GM stuff instead of shelling out all the money for stuff that didn't fit. My 2 cents and good luck!
