According to the ZCCA judging rules, a stock car is defined by how the car came out of the factory and not the dealership (or how you want the car to look re: fog lights, etc.). A FG shroud would not have any points deducted if it was clean and installed correctly. If there was a tie between two cars, then the one with the metal shroud would win based on originality. The same holds true for braided hoses, tires, batteries, etc. Original parts trump new parts as long as they are clean. Rules not to your liking, then join the rules/judging committee and work to change them, otherwise "render unto Caesar what is Caesar's" and move along. How long did Carl Beck search for the correct rallye lights for his BRE car? Ask him if he over paid for them.... Their worth is proportional to your desire to have them.