Chevrolet produced casting number 361959 from 1973 to 1990, making it one of the most common of all 454-block engines. This engine was an option on 1973 to 1975 Chevelles, and was used in a number of other full-sized Chevrolet passenger cars through 1976. Although 1976 was the last year the 454 ever saw passenger car duty, this big block engine came in a number of GM trucks all the way up through 1990.
Horsepower
From 1973 to 1976, the 361959-block engine produced between 270 and 275 horsepower and 390 pound-feet of torque. The power dropped precipitously during the 1970s and early 1980s, from 240, to 210, 200 and finally to 190 horsepower by 1982. The old big block received electronic fuel injection in 1990, boosting its power output to between 230 horsepower and 385 foot-pounds of torque, to 255 horsepower and 405 foot-pounds of torque.
The 781 heads are some of the best open chamber BBC heads out there.
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Ray
1970 SS Chevelle Van Nuys Built
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