Even smoother and supremely strong was the overhead valve Buick straight 8 engine in the Buick Special and Super models. The Roadmaster was even a bit longer and bigger. These held their own with the Cadillac V8s. I drove several Buicks and loved them. Then in 1953 Buick produced the Century.
But Chevrolet had straight sixes from (I think) about 1929 until 1954. Ford started producing I6es in the 1960s, and had them even in the Mustang body. I had one of the I6 F150s for 15 years, a much better engine than the V6, IMHO.
