No Limits Magazine from Wild About Cars
Profiling High Performance Cars and the Golden Era of Detroit Iron
- We Bring History to Life and Put Resources in the Hands of the Enthusiast -
Monday April 28, 2014
Chevy Big Block Exposed, '68 GTO RA, '69 Fairlane Cobra, & '66 Chrysler 300 TNT Tests, '03 Corvette Poster, Logano Wins Richmond - and More!

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The 427 arrives and spawns many more Chevy BBs
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The 1969 351 Windsor Hi-Po

Ford Small Blocks Part 2: the
351 Windsor Arrives

2005 Shelby Cobra Media Kit

2005 Shelby Cobra Concept
Media Booklet

1960s Mopar Paint Codes

Mopar Paint Codes and Paint Mix
Codes added to "Techipedia"

The 1970 Chevy 454 LS6

The high-water mark for the street Chevrolet
Big Block was the 1970 450 HP 454 cu. in. LS6.

1969 All Aluminum 427 ZL1

The most outrageous BB may be the all aluminum ZL1 427.
Essentially it was a L88 done up in all light metal.

The high water mark - the Chevelle LS6

The high water mark LS6 Chevelle shocked
the muscalecar community.

by Wild About Cars Staff - reprint with permission only.

The 427 cubic inch version of the big-block became available in 1966. The new size was accomplished by increasing the bore to 4.251", and keeping the stroke the same at 3.76". The 427 did not replace the 396, but rather complimented the 396's power levels of 325, 360, and 375 HP by offering 385, 390, and 425 HP versions.

Of course, torque was up too from 415 to 460 and this made a huge difference in acceleration! It should be said here that the 427 was not available in the Camaro and Chevelle, being exclusive property of the Corvette and full-size Chevrolets. "COPO" and aftermarket installations of the 427 in the Camaro, Chevelle and Nova was either against GM's regulations or was done in a way to circumvent GM's rules.

More levels of the 427 were added in 1967; these were rated at 400, 430, and 435 HP. The 1967 427, option code L88 had particular significance for Chevrolet enthusiasts. This was an all-out, high-performance version of the 427 cubic inch engine that came with aluminum heads. It was purposely rated at only 430 HP, 5 HP less than the L71 435-HP engine, to discourage sales to unsuspecting owners who didn't really want a race engine in a street Corvette. You could also get aluminum cylinder heads on the L71 engine, a unique option code of L89.

In 1967, the 396 cubic inch engines continued in the same three power levels as in 1966, although the 360 HP engine was down-rated to 350 HP. The 396 engine would be offered in these same configurations through 1969.

The 1968 and 1969 427 cubic inch engine availability was the same as 1967. The special ZL1 427 engine was on the Corvette's option list in 1969. It was, in effect, an L88 with an aluminum block. Since this was a rather costly option at $4,718.35 (about $50K today), only two engines were factory installed in Corvettes although many more were sold over the counter. As has been documented in other articles, sixty-nine were installed in COPO Camaros.

After 1970, the 351W 4-barrel was replaced by the 351 "Cleveland". However, upon the demise of the Cleveland after 1982, a four barrel version (casting E6TE-9425-B) was re-introduced for use in light trucks and vans. In 1988 fuel-injection replaced the four barrel carburetor. Roller lifters were introduced on the 351W in 1994.

The high-output 427 cubic inch Turbo-Jet engines were available only in the Corvette in 1966. In 1966 Chevrolet full-size cars could only receive the L36 385 HP engine. Option L72, rated at 425 HP, was optional in 1968 and 1969, and a low-performance 427, the 335-HP LS1, was added to the passenger-car option list in 1969.

1969 was the last year for the 427 cubic inch and the 396 cubic inch engines. During the 1970 model year, the 396 engine block was replaced with one that had a slightly larger bore of 4.125". The result was 402 cubic inches, yet the engine was still marketed as a "396" on all Chevrolet Super Sport models of the Nova, Monte Carlo, Camaro, and Chevelle. On other Chevrolets the 402 was known as the "Turbo Jet 400". This engine should not be confused with the 400 cubic inch small-block, which was also introduced in 1970. It was known as the "Turbo-Fire 400". The 402 cubic inch big-block was removed from the option list after the 1972 model year. . . .

To read the rest of the Growth of the Big Block Chevrolet - Click HERE!

To see more pictures & details on all the 1965-1976 Mark IV Big Blocks - Click HERE

To read articles on the Chevy BBs in period Magazines - Click Here!

To see the 1970 Chevelle and Camaro
Brochures - Click Here!

To See 1969 Corvette Brochures and
Folders - Click HERE!


More Stories at Wild About Cars and the Auto History Digital Documents Library
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1968 Ram Air GTO Test 1968 Pontiac Ram Air GTO Road Test - "Class with a capital GTO"

Hot Rod Magazine tested the 1968 Ram Air Pontiac GTO in their February 1968 issue. "when you are talking about supercars, don't forget the one that started the whole thing" said the Hot Rod Staff. Managing Editor Don evans summed it up "How sweet it is." Indeed.

Click here to read about the 1968 Ram Air GTO Test!

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1969 Forf Fairlane Cobra Test 1969 Ford Fairlane Cobra Road Test!

Car Life Magazine was terribly disappointed in their test of the 1968 Ford Torino GT a year earlier - the performance was just not there in the 390 V8. Well Ford was listening and the 1969 Fairlane Cobra wiped out all those misgivings. CL staff said "It's one of Ford's best supercar tries." See what they had to say about the 428 engined Fairlane Cobra.

To read the 1969 Ford Fairlane Cobra Test - Click HERE!

1966 Chrysler 300 TNT Test 1966 Chrysler 300 "TNT" Road Test

We were always big fans of Chrysler's 300 letter car series. Each year, more and more performance was extracted in that big-ass car. When the boys at Mopar decided to kill them, we were sad - figuring that it would be up to Dodge and Plymouth to carry the flag. However, when we read Car Life Magazine's test of the 1966 "TNT" package for the 300 - we were happy again. No letter in the 300 logo - but performance - you bet! The 5,060 lb behemoth could get it done - 16 flat at 88 mph is something else. Read the rest of this test.

To read this 1966 Chrysler 300 TNT Test - Click HERE!

2003 Corvette 40th Anniversary Poster Modern Muscle - 2003 Corvette 50th Anniversary Poster!

Benchmarks for boutique cars are significant - they show the staying power of the car and they, most importantly - they keep the public interested. Of course, the model has some uniqueness to it - then sales should result. In 2003, Chevrolet wanted to make sure the pubic was aware of Corvette's longevity - so they came out with a special 40th model. Check it out!

To see the 2003 Corvette 40th Anniversary Poster - Click HERE!

Logano Wins Richmond Race News - Joey Logano & Ford cement Chase spot with hard-fought NASCAR Sprint Cup win at Richmond

Taking advantage of beating and banging in front of him during a nine –lap green-flag run to the finish, Logano surged from the fifth starting spot to his second victory of the season in Saturday night's Toyota Owners 400 at Richmond International Raceway.

Click here to read more about Logano's win in Autoweek Race News!

MSD Atomic EFI receives CARB exemption
Product News - MSD's Atomic EFI Receives CARB Exemption!

MSD Performance's Atomic Fuel Injection System (PN 2900 & 2910) has been granted an Exemption from the California Air Resources Board! This exemption makes the Atomic the only aftermarket EFI system that is legal on 1987 and older GM vehicles in California! The Atomic EFI system received E.O. Number D-722 which permits the system to be installed in place of the factory carburetor on 1987 and older GM passenger cars and trucks originally powered by a V8 engine . . .

CLICK HERE to read about the Atomic EFI for older cars!.

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