Can You Put 400 Heads On A 350?

Is a Pontiac 400 the same as a Chevy 400?

A Pontiac 400 is a big block that will only mount to a Pontiac transmission.

A Chevy 400 is a small block motor with a chevy pattern transmission bolt pattern.

Very different motors other than both are v8’s and both made by GM.

The old Chevy Vega had many issues with its aluminum engine..

Can you put Vortec heads on a 305?

Get a set of 305 L30 Vortec heads. NO, they don’t flow as good as the 350 Vortecs but they flow better than most production 350 heads and they work GREAT on a 305. They don’t have the 350 Vortecs heart shaped chamber but they do have a 58cc chamber which solves your compression problem.

Can I put Vortec heads on a 350?

If you wanted the Vortec heads on your engine then you would have to buy a new intake manifold to be able to get the TBI set-up onto the heads. … But you would need to buy a TBI intake manifold to bolt up to the Vortec heads. You can’t by a spacer for the Vortec intake manifold.

Are Vortec heads better than double hump heads?

Types of GM Vortec Heads The L31 Vortec heads have larger ports than the older Gen I cast steel heads, so they outflow the older heads. The Vortec heads are a little bit lighter than the older heads and have a “kidney” or “heart” shaped combustion chamber that is more efficient than the double hump chamber.

Can you put 350 heads on a 327?

Bill, 350 heads will work on your 327. Avoid 305 heads like the plague, though. You will want to find some with similar size combustion chamber and valve size/port size in order to keep at least the same power output your 327 had when new.

Is a 400 small block a good motor?

Overall, the 400 SBC is a really good block. They do come with a bit shorter connecting rods (5.565″ compared to 5.700″ for the 350) than do most of the other SBC engines out there.

What is a 406 stroker?

a 406 is a 0.030″ over 400 SBC.

How much horsepower would a stock 400 SBC with Vortec heads?

376 hpWith the stock Vortec heads, the low-compression 400 managed to make 376 hp and almost 450 lb-ft of torque.

Will Vortec heads fit a 327?

The L31 Vortec heads will bolt onto any Gen I small block. Your 327 isn’t any different than any other Gen I small block built from 1955 thru 2002. The main difference with using the Vortec heads is the different intake bolt pattern as already mentioned.

How much does it cost to build a 400hp 350?

The final bill for our 400hp build up checked in at $1,155, including the cost of the motor. We were excited about the 400hp peak number, but what really made us happy was the fact that this low-buck motor produced over 400 lb-ft of torque from 3,700-5,200 rpm.

Why is a 383 better than a 400?

A 4.030 bore 350 block will give you 383 with a 3.75″ stroke crank. The SBC 400 has a much larger BBC sized bore of 4.125″ so it is bigger and better than the smaller bore motor (it has a bigger crank journal as well as being designed from the ground up for a 3.75″ stroke).

Can you put Vortec heads on a 400 SBC?

In case you missed the story, the best power numbers were gained with a set of GM Performance Parts Vortec heads supplied by Scoggin-Dickey, and even then the 400 small block Chevy managed only 401 hp and 458 lb-ft of torque. … That’s a peak horsepower bump of 65!

Are 305 heads good on a 350?

305 heads on a 350 will raise your compression a good deal, maybe even too much for pump gas if you have flat tops or domed. I would go with 350 heads if I were you. If you have flat top pistons a set of 350 heads would be best.

Which is better a 383 or 406?

If you were to build 2 motors, identical except that one was a 383, and the other was the 406, the 406 will make more power across the entire rpm range. Achieving you power goals at lower rpms means less stress on the internal components, which usually translates into longer engine life.

What are the best 305 heads?

Imho, the best 305 head is the -601! They have 1.84″/1.50″ valves; hardened seats; a compression chamber that will run from 53 to 58 cc’s SO you HAVE to cc them!! 160 and + cc intake ports and best of all, chambers that are like the old -461 “fuelie” head that are double-quenched!!

What is the difference between 305 and 350 heads?

A Chevy 305 has a 3.74″ Bore with a 3.48″ Stroke. A Chevy 350 has a 4.00″ Bore and a 3.48″ Stroke. So technically its just a smaller bore. The 305 heads are 53cc chambers and can be put on a 350 to increase compression, but at the minor expense of flow.

How much HP can a stock 400 SBC crank handle?

Registered. 400 cranks are nodular iron and will handle 500 hp easy.

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.