I have ordered AMD and Goodmark for my 69 Chevelle. To be perfectly honest, I haven't had any issues with Goodmark so far. Everyone thinks AMD is better and that may or may not be true. I've installed left and right fenders, left and right door shells, hood, trunk deck lid, and so far everything looks great. Clean crisp lines, and no fitment issues. Haven't tried the quarters, wheelhouses, and trunk pan yet. AMD, Dynacorn, Goodmark, Golden Star, Sherman all come from Taiwan anyway. There may be an AMD part that fits better than a Goodmark part, and vice versa. I am only speaking on my experience. I am not a professional. Just my 2 cents!