The 1975 Corvette Base was, simply put, very slow. As Edmunds explained, Chevrolet switched engines for this model year and it went very, very badly. Most Corvettes in the 1975 model year produced just 165 hp.
"This is the Corvette at its lowest and yet Chevy managed to sell 38,665 of them anyhow. That's 1,164 more than it did of the '74 and, up until that time, the most Corvettes Chevy had ever sold during a model year. Go figure," Edmunds said.