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Mark IV Big Block Chevy Engine - The Mark of Chevy Power

Where Chevy Muscle Really Lives

By Paul Zazarine, Photography by Courtesy of GM

1965-1974 Chevrolet Mark IV Engine Specifications

RPO Displacement Horsepower Torque Application
1965
L35 396 325@4,800 410@3,200 Chevrolet
L78 396 425@6,400 415@4,000 Chevrolet
L78 396 425@6,400 415@4,000 Corvette
L37 396 375@5,600 415@3,600 RPO Z16 Chevelle
only
1966
L35 396 325@4,800 410@4,800 Chevrolet/Chevelle
L34 396 360@5,200 415@3,400 Chevelle
L78 396 375@5,600 415@3,600 Chevelle
L36 427 390@5,200 470@3,600 Chevrolet/Corvette
L72 427 425@5,600 460@3,600 Chevrolet/Corvette
1967
L35 396 325@4,800 410@3,200 Chevrolet/Chevelle
L34 396 350@5,200 415@3,400 Chevelle/Camaro
L78 396 375@5,600 415@3,600 Chevelle/Camaro
L36 427 390@5,200 460@3,600 Chevrolet/Corvette
L68 427 3x2 400@5,400 460@3,600 Corvette
L72 427 425@5,600 460@4,000 Chevrolet
L71 427 3x2 435@5,800 460@4,000 Corvette
L88 427 430@4,600 485@4,000 Corvette
L89 427* 435@5,800 460@4,000 Corvette
* Aluminum Head
1968
L35 396 325@4,800 410@3,200 Camaro/
Chevrolet/Chevelle
L34 396 350@5,200 415@3,400 Nova/Camaro/
Chevelle
L78 396 375@5,600 415@3,600 Camaro/Chevelle
L89 396 * 375@5,600 415@3,600 Camaro/Nova
L72 427 425@6,400 460@4,000 Chevrolet
L36 427 390@5,400 460@3,600 Corvette
L68 427 400@5,400 460@3,600 Corvette
L71 427 3x2 435@5,800 460@4,000 Corvette
L88 427 430@4,600 485@4,000 Corvette
L89 427* 435@5,800 460@4,000 Corvette
* Aluminum Head
1969
L35 396 325@4,000 410@3,200 Camaro/Chevelle
L34 396 350@5,200 415@3,400 Chevelle/Camaro/Nova
L78 396 375@5,600 415@3,600 Chevelle/Camaro/Nova
L89 396+ 375@5,600 415@3,600 Chevelle/Camaro
L36 427 390@5,400 460@3,600 Chevrolet/Corvette
L72 427 425@5,600 460@4,000 Chevrolet/Corvette
LS1 427 400@5,400 460@3,600 Chevrolet
L72 427 425@5,600 460@4,000 Chevelle *
L68 427 400@5,400 460@3,600 Corvette
L71 427 3x2 435@5,800 460@4,000 Corvette
L88 427 430@5,200 450@4,400 Corvette
L89 427+ 435@5,800 460@4,000 Corvette
RPO Displacement Horsepower Torque Application
ZL1 427@ 425@5,600 460@4,000 Camaro #
ZL1 427@ 430@5,200 450@4,400 Corvette
* COPO 9562,9566,9694
430@5,200
450@4,400
# COPO 9561 427 ZL1
# COPO 9560 427 ZL1
+ Aluminum Head
@ All Aluminum
1970
L34 396/402 350@5,200 415@3,400 Camaro/Chevelle/
Nova
L78 396/402 375@5,600 415@3,600 Camaro/Chevelle/ Nova
LS3 400 330@4,800 410@3,200 Chevelle
LS5 454 390@4,800 500@3,400 Corvette
LS6 454 450@5,600 500@3,600 Camaro
L89 402* 375@5,600 415@3,600 Chevelle
LS5 454 360@5,400 500@3,200 Chevelle
LS6 454 450@5,600 500@3,200 Chevelle
LS7 454 460@5,600 490@3,600 Corvette
* Aluminum Head
1971
LS3 402 300@4,800 400@3200 Chevrolet/Chevelle/
Monte Carlo/Camaro
LS5 454 365@4,800 465@3,200 Chevrolet/Chevelle/
Monte Carlo/Corvette
LS6 454 425@5,600 475@4,000 Chevelle/Monte
Carlo/Corvette
1972*
LS3 402 240@4,400 345@3,200 Monte Carlo/
Chevelle/Camaro
LS5 454 270@4,000 390@3,200 Chevelle/Chevrolet/
Monte Carlo/Corvette
* SAE Net
1973*
LS4 454 275@4,400 395@2,800 Chevelle/Monte
Carlo/Corvette
* SAE Net
1974*
LS4 454 235@4,000 360@2,800 Chevrolet/Monte
Carlo/Chevelle
LS4 454 270@4,400 380@2,800 Corvette
* SAE Net
By Paul Zazarine
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