Felpro makes a head gasket that allows one to put these heads on a Mark IV block. I have read stuff from some of the truck guys that they have made 600lbs. tq. with these babies, so they should work good on a street motor.
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Felpro makes a head gasket that allows one to put these heads on a Mark IV block. I have read stuff from some of the truck guys that they have made 600lbs. tq. with these babies, so they should work good on a street motor.
Chevy launched the Mark IV V-8s in 1965, but the 454 didn't arrive until 1970. And its timing couldn't have been worse. The 454 wielded massive horsepower and torque for two years before General Motors detuned its engines beginning in 1972 to accommodate stricter federal emissions and safety standards.