In 1970, Chevy bored out the 396 cid big blocks by 0.03” from 4.094” to 4.125”, which raised the total displacement to 402 cid. Pretty much everything else stayed the same internally. One other change though was the spark plugs, which got a new seating design for 1970. Credit: Gray...
but they discontinued both of them following the 1965 model year. In 1966, there were only three 327 engines available; the L30, which now made 275 horsepower, the L74/75, and the L79. The L79 had been introduced the previous year, and it made 350 horsepower and 360 lb-ft of ...
The 396 was bored and stroked to 427 cid for '66, putting up to 425 bhp beneath the hood of the Impala SS. Chevrolet's offering in the intermediate ranks was the Chevelle, and its Super Sport version became one of the most-popular muscle cars of all time. Introduced for 1964, the ...