I would like to assemble the parts needed to replace the small Weber air filter with a stock filter for a ‘74, but I cannot find a post that shows the differences. Shown below are two now or formerly for sale— is the black one what was used in 74-76? Were they black, gray or both? I know the earlier version had three supporting legs, but did the later version as well, or just one bracket? I could not find a sample in Realoem. I am also looking for the Paul W thread that lays out how to do the conversion with a Weber 32/36 in place, but my search skills are not working today. Thanks!