ZZ572/620 (12498792) and ZZ572/720R Long Block Specifications
Specifications Part Number 88962928
This ZZ572 long block specification sheet should be used in conjunction with the ZZ572 short block specification sheet, part
number 88962927.
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committed to providing proven, innovative performance technology that is truly.... more than just power. Chevrolet Performance
Parts are engineered, developed and tested by the factory to exceed your expectations for fit and function. Visit our website at
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This publication provides general information on components and procedures that may be useful when installing or servicing
a ZZ572 long block assembly. Please read this entire publication before starting work. Also, please verify that all of the
components listed in the Package Contents section below were shipped in the kit.
The information below is divided into the following sections: package contents, torque information, ZZ572/620 and ZZ572/720R
long block assembly specifications, and a service parts list.
The ZZ572 long block assembly includes additional components to the short block assembly which make up the long block.
Some key items included are the aluminum cylinder heads, valve train, camshaft, lifters, SFI Foundation Inc. approved
harmonic damper, and oil pan. Specific items and part numbers are listed at the end of these instructions.
Chevrolet recommends that you use a minimum octane rating of 92 (R+M/2) fuel in the ZZ572/620 (9.6:1 compression ratio)
and 110 octane fuel in the ZZ572/720R (12:1 compression ratio) to prevent preignition.
It is not the intent of these specifications to replace the comprehensive and detailed service practices explained in the factory
service manuals.
For information about warranty coverage, please contact your local Chevrolet Performance Parts dealer.
Observe all safety precautions and warnings in the service manuals when installing a ZZ572 Tall Deck Big Block Chevrolet
(BBC) long block assembly in any vehicle. Wear eye protection and appropriate protective clothing. Support the vehicle
securely with jackstands when working under or around it. Use only the proper tools. Exercise extreme caution when working
with flammable, corrosive, and hazardous liquids and materials. Some procedures require special equipment and skills. If you
do not have the appropriate training, expertise, and tools to perform any part of this conversion safely, this work should be done
by a professional.
The information contained in this publication is presented without any warranty. All the risk for its use is entirely assumed by the
user. Specific component design, mechanical procedures, and the qualifications of individual readers are beyond the control of
the publisher, and therefore the publisher disclaims all liability incurred in connection with the use of the information provided in
this publication.
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ZZ572/620 and ZZ572/720R Long Block Specifications
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