Here you go!
Paint code 375 = Mariner Grey
Trim 2734 = Explorer Grey Stockholm and Volta
AG 9 = Deluxe bumper guards front and rear, chrome wheel covers, tail pipe extension, tenite plastic steering wheel, electric clock, electric wipers, oil bath air cleaner, directional signals, rear cigar lighter, and day/nite mirror. All of this for $113.59!
Trim tag information was originally documented in service literature. It's also in the appendix of the Last Onslaught on Detroit, written by Richard Langworth and published in 1975. If you don't have a copy, it is well worth seeking out. Amazon usually has a copy or two for sale.
The information should also be available in the club's handbook which is available on CD. If you're a member you should have received one. If you're not a member, join and you will!