Thread: 327 "High Torque"?

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Welcome to CHR:
In all likelihood, the 327 in your 1972 chassis is a transplant. The last production 327 was built in 1969. It came with a with a two-barrel Rochester carburetor, had a 9-to-1 compression ratio and was rated at 235 horsepower and 325 foot pounds of torque. The high torque on the valve cover designated a truck engine. On the 327 (as well as the 283) they had different heads with a relatively small intake valve (1.72/1.50 versus 1.94/1.50 for cars) and short runners which resulted in higher velocity and quick acceleration at low RPMS but is gasping at about 3500 RPM and peaks at around 4K. As I recall, the torque was typically 10% greater than the engines installed in standard production Impala with the same rated horsepower so you’re probably looking at 235 horsepower and a maximum of 345 foot pounds of torque.

The decals came on a whole bunch of engines – all trucks.