Think for a 70 the number is 1237554. Key word is 'think" Shows in book as Group 7.833 Baffle, Front Bumper Spoiler 1237115 70 - 72 GSX (supercedes 1237554)
Makes sense to why the number was superceded. 1237554 (70 #) is not in a 1974 price guide. So, it had to be discontinued and was replaced with the 71-72 version.