I have a big stack of (mostly) Road and Track magazines from the 70s. They are fantastic with refreshingly honest reviews of the era’s cars. Technical specs are present and accounted for as well. There is a mid 70s review of a Subaru which is particularly brutally humorous. Not sure what the legality of scanning and sharing the reviews but I suspect sharing the ads is ok. I’ve scanned quite a few avaliable here. Here a few of my favorites.
1976 Datsun F-10
1976 Dodge Colt
1980 Datsun truck
1977 Mazda RX-3 SP
1976 Chevrolet Camaro Rally Sport