Читать книгу Chevy Big-Block Engine Parts Interchange - John Baechtel - Страница 3

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© 2014 by John Baechtel

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Edit by Paul Johnson

Layout by Monica Seiberlich

ISBN 978-1-61325-181-2

Item No. SA320

Library of Congress Cataloging-in-Publication Data

Baechtel, John.

Chevy big-block engine parts interchange / by John Baechtel.

pages cm

1. Chevrolet automobile--Motors--Parts. 2. Chevrolet automobile--Motors--Modification. I. Title.

TL215.C5B338 2014

629.2504--dc23

2013034376

Title Page: Cast-iron exhaust manifolds on early performance big-blocks were much more efficient than the restrictive small-block manifolds and are still highly sought for many performance restorations. Note the passenger-side dipstick, aluminum bellhousing, and shielded plug boots. (Photo Courtesy GM Media Archive)

Top Left: The sonic tester is held against the cylinder wall at the major and minor thrust surfaces and 90 degrees from them at the top, middle, and bottom of each bore to obtain a thickness reading. (Photo Courtesy NDT Systems)

Top Right: This comparison shows the difference between the bump rod (right) and the small-bolt truck rod (left). The large-bolt high-performance rod beam is substantially beefier around the big end. However, if aftermarket bolts are used, the truck rod is suitable for hot street performance efforts. The big difference is the cost of reconditioning these rods versus a new set of affordable (and typically stronger) aftermarket rods.

Middle Left: All big-block heads use stamped steel guideplates and screw-in studs. Mark IV heads are all tapped for 7/16-inch coarse-thread studs, but the top of the studs can be either 3/8 or 7/16 inch depending on the application. When shopping for guideplates remember that high-performance versions use 3/8-inch pushrods and standard engines use 5/16-inch pushrods, so choose your guideplates accordingly.

Middle Right: This is a reproduction set of exhaust manifolds from Classic Industries. Casting number 3909879 (bottom) is the driver-side manifold for a 1967–1970 396 or 402 Camaro, Chevelle, 1968–1970 Nova, or 1970 Monte Carlo. Depending on your project, they may also fit other applications with engine swaps. The manifold shown on top (casting number 33916178) fits the passenger’s side of a 1968–1970 396 and 402 Camaro, Nova, Chevelle, Passenger car, and Monte Carlo. (Photo Courtesy Classic Industries)

Bottom Left: For comparable expense, racers and even restorers can turn to the aftermarket for new high-quality cranks, rods, and pistons. This provides a broad selection of cast and forged components, plus the ability to juggle sizes of stroke and rod length, pin placement, and even ring position.

Bottom Right: Upper (PN 12464484) and lower (PN 12464482) Ram Jet manifolds can be purchased separately if you wish to use an aftermarket controller. The factory throttle body assembly is PN 17113524. (Photo Courtesy Scoggin-Dickey Parts Center)