Quick Answer: Are All 350 Blocks The Same?

Is 305 and 350 the same block?

As mentioned above the 305 and 350 are the same except for the bore.

Yes you can make a 305 a 350 but you have to have the right block.

With the 305 being the “Corporate Engine” of the 80’s, There were more 305’s than 350’s and low budget race teams were forced to use the 305..

What year Chevy 350 is the best?

L31 (2002) From a purely technical standpoint, the most recent version of the Chevy 350 would naturally be the best of the bunch. Marketed as the “Vortec 5700” engine, but known internally by the moniker of L31, this engine was used primarily in GM vans and trucks until 2002.

Can you use 350 heads on a 305?

Virtually any 350 heads will work on a 305. The high compression 350 heads are similiar in combustion chamber size & intake valve size to the 305 heads & will give a 305 the same performance as if using 305 heads.

Can you put 400 heads on a 350?

400 heads on a 350 block is a great way to increase your midrange and top end power. The swap is a direct bolt – on deal, you just need to be sure to use 400 head gaskets when you do the swap.

What is a 350 block?

The Chevy 350 engine is a 350 cubic inch (5.7-liter) small block V8 with a 4.00 and 3.48 inch bore and stroke. Depending on the year, make and model of a car, horsepower ranges from approximately 145 to more than 370.

How can you tell a 350 block?

How to Identify a Chevy 350 MotorLook at the rear of the engine block for casting numbers, by where the transmission mounts to the engine. … Write down that number, and go to MorTec.com. … Look for a second casting number on the rear of the block. … Look at the front of the block, just forward of the valve covers.

What can a 305 be bored out to?

We run 305 Chevy powered sprint cars around this area with stock blocks and they can be bored . 060″ over, and turn 8300 RPM’s. Hardly a POS engine. A 305 Chevy has a stock bore of 3.736 so even at .

How do you tell if I have a 305 or 350?

By far the easiest way would be to pull a head and measure the bore. A 350 will have a 4 inch bore ( as would a 327 or a 302) while a 305 will have a 3.736 in bore. The difference is very pronounced once you know what you are looking at .

How do you tell a 327 from a 350?

The compression height of the piston (1.67 for a 327; 1.56 for A 350), or the casting number on the crankshaft should tell you what it actually is.

What’s the difference between a 350 and a 350 Vortec?

Vortec Means Power Vortec heads instantly added 55 or more horsepower to a regular 350 head with the same displacement. Automotive enthusiasts are quick to note that the 350 and the 5.7 Vortec are essentially the same engine with the same displacement.

Is a 400 small block better than a 350?

A small block 350 and a 400 have an identical block design. Most accessories will fit either engine. The major difference is found in the casting numbers and the way they are balanced. Most 350 cubic inch engines are internally balanced whereas the 400 engines are not.

What is the largest small block engine?

The largest-displacement small-blocks ever produced by GM are the LSX454/LSX454R crate engines offered through Chevrolet Performance, at 454 cubic inches (7.4L); the largest-displacement small-block for a production vehicle is the 427-cubic-inch (7.0L) LS7 used currently in the Corvette Z06.

What is the biggest SBC you can build?

The Largest Stock Bore Space Small Block Chevy Is Done! 511 Cubic Inches Of America! Generally speaking, especially when it comes to engine displacement, bigger is …

How much power can a stock 350 crank handle?

For small-blocks, a safe limit for a cast crank is 500 hp and a maximum of 6,500 rpm. With big-blocks, their bigger mains will handle 650 hp. We’ve seen cast cranks in turbo motors take over 2,000 hp, but we don’t recommend it. These days, 4340 is the standard for forged cranks.

Can a 350 be a big block?

There is such a thing as a 350 big block, but it is NOT a Chevy. Pontiac, Olds and Buick each made a 350 and all three are considered big blocks (same blocks as their respective 400 and 455 engines).

How much HP can you get out of a 305?

A TBI 305 with HO parts will make 280 HP fairly easily.

What’s better small block or big block?

A big block engine is physically larger and weighs more than a small block. [4] Larger bores, longer strokes, bigger valves and ports can lead to truly astounding power production. If a small block is a quick and nimble welterweight boxer a big block can be devastating heavyweight.

A favorite for engine swaps, the 350 is very easily modded because of the abundance of aftermarket parts. And because so many Chevy 350s have been produced, they’re affordable and easily attainable for swaps of all kinds. You can find a Chevrolet 350 in just about anything—on land, sea, or air!

How many miles will a 350 Chevy last?

229k miles is not unheard of for a properly maintained 350. You could do a compression test and leak down test to analyze the health of the motor.

Will 327 heads fit on a 350?

They are perfect for a 350. Both the 327 and the 350 have a 4″ bore so they like the same heads. Old heads like that will have softer valve seats, so if you want them to last a long time, you should either replace the seats or run leaded gas in the engine.