Chevrolet by the Numbers: 1970-1975, published by Bentley (1994), is the authoritative reference for identifying and verifying the correct and exact Chevrolet V8 drivetrain parts, by casting number, for your vehicle. This book covers all 1970-1975 passenger cars, including:

• Chevy Chevelle
• Chevy Camaro
• Chevy Corvette
• Chevy Nova
• Chevy Bel Air
• Chevy Monte Carlo
• Chevy Impala
• Chevy El Camino

Engines covered include the 262, 307, 350, 400, 402, and 454 c.i.

• Find the drivetrain casting numbers that correspond to your car's Vehicle Identification Number, and get the right parts.
• Casting numbers will help you ascertain whether or not the car has been authentically restored, and if purchasing it will make a good investment.
• Know which parts to look for at swap meets, why they are special, and which engines those parts will fit.

Book Excerpt: Chevrolet By The Numbers 1970-1975: Chevy V8 Drivetrain Casting Part Numbers INTRODUCTION

MATCHING NUMBERS One of the most misused and misunderstood phrase in the restoration hobby is "numbers matching." Everyone, from those who have large collections of cars to people who have only a vague interest in the hobby, has their own interpretation of what constitutes a numbers matching car. Many hobbyists use the term loosely with no clue to what it actually means. "Numbers matching" simply means a car which not only appears in original factory condition, but in which all pertinent identification numbers, as well as all casting numbers and dates, are correct for that specific model and pre-date the final assembly date of the car. (The term probably originated in the Corvette restoration hobby. It seems these cars were the first to be restored back to true originality. ) It is important to also make the distinction that a car is only original once, period. There are more and more "manufactured" cars turning up in collectors' hands, cleverly documented to be original numbers matching vehicles. What I mean by "manufactured" is that the car has been rebuilt with correct casting numbers to appear original and to match the documentation to be included in the sale of the car. To say that this situation is creating a major problem in the hobby is a vast understatement. Thousands of dollars are being invested into many matching number cars which in fact are complete forgeries, built for the primary purpose of selling an incorrect car as a documented original. Many enthusiasts are unsure as to what composes a correct car. Much of the information that has been published to date in this area has been incorrect in several aspects.

TRANSMISSION IDENTIFICATION

INTRODUCTION This chapter covers all transmissions from 1970 through 1975. This introduction gives a brief overview of the transmissions, while the rest of the chapter is structured by model year to allow you to quickly and easily determine transmission applications. Under each year heading there is a quick-access section, transmission specifications with parts casting numbers, and stamping number decoding. At the end of this chapter are specific transmission casting number charts, which will allow you to access individual casting numbers without hunting through the entire chapter.
CASTING DATE CODES Casting date codes can be found on almost all maincases, extension housings, and sidecovers. Most casting dates are in alpha-numeric style, and usually follow the same pattern as blocks and cylinder heads. Many casting dates are difficult to read. The first digit of a casting code is usually a letter, to designate the month. The second digit will be a letter, designating the month. The third digit designates the day of the month, while the fourth (or last) digit designates the calendar year.

If you absolutely want to know the original parts for your Chevrolet - not what interchanges or fits, but the correct part that came with your car when it was assembled - Chevrolet by the Numbers has the answer. Subject: 1970, 1971, 1972, 1973, 1974, 1975 Chevy Drivetrain Part Casting Numbers Reference Guide. ISBN-10: 0837609275 | ISBN-13: 9780837609270 | Bentley Part No. GC75 | GM Part No. 24502564