What are the specs of a 1991 Chevy 454?

1991 Chevy 454 Specs 1 Engine Layout. The 454 engine block appears in a very distinctive “V” shape with a row of cylinders on both sides. 2 Generation Five. The Generation Five, called Gen V by Chevy’s marketing team, is the name given to the 1991 Chevy 454 engine. 3 Performance Specs. …

Which is 454 engines were in Chevy one-tons?

The 1973 1-ton trucks were equipped with a 240-horsepower 454 generating 355 foot-pounds of torque. In 1977, General Motors offered special trailering packages for its Chevys and GMC trucks, including the 1-tons. These 454s with four-barrel carburetors developed 230 horsepower and 360 foot-pounds of torque.

When did the Chevy 454 pickup truck come out?

In 1973, with the 454 having left the high performance world and migrated over to sedans, personal luxury coupes, and ‘utes, GM decided to also add it to the pickup truck order sheet at Chevrolet and GMC. This coincided with the square body style and new platform for each brand’s pickups, which would run from 1973 all the way to 1991.

Is the Chevy 454 LE8 still in use?

The LE8 version still served GM trucks through 1991, although its horsepower rating varied from a low rating of 215 horsepower in 1974 up to about 230 in 1991. The standard transmission matching the LE8 454 on 1973 to 1987 trucks was the four-speed Muncie manual.

What was the last year the Chevy 454 was made?

Another big blow for the 454 was the gas crisis of 1973 which pretty much sealed the fate for the motor during this period. The last Chevelles of 1973 used the 454 but by this point the engines had been toned down to a measly 245 horsepower. The Corvette followed suit by the end of 1974 and also bid farewell to this once powerful engine.

How to build a Chevy 7.4L 454 engine?

Complete Engines for Chevy 7.4L/454 Engine Side Refine Panel Shop by Category Engines & Components Complete Engines Belts, Pulleys & Brackets Block Parts Camshafts, Lifters & Parts Crankshafts & Parts Cylinder Heads & Parts Engine Bearings Engine Rebuilding Kits

When was the first Chevy 454 engine made?

The first engine to wear the 454 designation was 1970, and many models produced in subsequent years would be based around those initial designs. The 1991 version of the Chevy 454 displayed several major changes to the old engine design that set it apart from all earlier Chevy engines also labeled 454.

What are the timing instructions on a Chevy 454?

Chevy 454 Timing Instructions. The numbers to the left of the V, looking at the engine from the front, are degrees of advance or how many degrees before top dead center. The numbers to the right of the V are degrees after top dead center. You always want to have the timing advanced or before top dead center.

What’s the difference between a Chevy 454 and a Gen V?

In many ways the Gen V looks very similar to earlier 454 designs, but key differences set them apart. First of all, the adjustable valvetrain older models sported was eliminated on the Gen V. Oil passage designs were modernized and the location of other fluid containers were moved to modernize the design.

What kind of manual transmission does a Muncie 454 have?

The Muncie four-speed manual with overdrive was available on 1982 to 1987 models. The 1973 to 1976 half- and three-quarter-ton trucks with the 454 received the TH350 three-speed automatic.

How much horsepower does a 95 Chevy 454 get?

I have a 95 Chevy 3/4 ton 454 ext. cab. The specs on it put it at a wimpy 260 horse. I figure since it’s only getting 10mpg, I might as well bump it on up to the days when 454’s were getting 450 horse. What would it take to get some serious performance out of this thing… on a budget / shadetree mechanic type setup?