How much horsepower does a 340 have?

The 340 was still the LA power king, with 240 gross horsepower and 290 lb-ft of toruqe – when the 360 was rated at 175 hp and 285 lb-ft….Premium Member.

1968 specs	1968 318 V8 (Valiant)	1968 340 V8
Carburetor type	2-bbl.	Carter AVS 4-bbl
Horsepower	230 @ 4400 rpm	275 @ 5000 rpm

What is a 340 Six Pack?

The 340 arrived in 1968 as an evolution of the 1965-67 A861 high performance 273 Four Barrel. Assigned factory engineering code A105 in single four barrel trim and A340 in Six Pack trim, the 340 was Dodge’s go-to small block performance mill through its discontinuation after 1973.

Is changing exhaust manifold hard?

Note: Removing the exhaust manifold on any vehicle is a very long and tedious process; as in most cases, it will require the removal of multiple engine components to gain access to and remove the exhaust manifold.

How much horsepower can I get out of a 440?

Although the most powerful factory stock 440 engines produced a rated 390 gross horsepower, the OEM blocks can take power in the 600hp range, and survive practically indefinitely at the 500-550hp level. Mopar built quite a bit of strength into the bottom end of these engines.

How do I know if I have a 340 engine?

If the last three digits are 3-1-8, it’s a 318. If they’re 3-6-0, it’s a 360. And if it’s 3-4-0, it’s a 340. Pretty straight forward.

What’s the difference between a 440 and a 440 magnum?

The 440 ‘Magnum’ in 1967 ONLY had a ONE YEAR ONLY closed chamber ‘915’ head with the larger 1.740 EXHAUST valve. The intake valves never went past 2.080 for the entire run through 1978. The ‘440 LP’ version was a 350 HP engine, while the ‘440 Magnum’ was rated at 375 HP.

When did the 340 exhaust manifold come out?

Early big-block exhaust development for the 1967 440 HP package (GTX and R/T models) led to the high-flow 340 exhaust manifold in 1968. The 340 manifolds were the standard for small-blocks for many years after 1968.

Which is the best exhaust manifold for a Mopar engine?

From an engine performance standpoint, the 1968 340 exhaust manifolds are a giant gain over the 273/318 log manifolds, and they fit in the engine compartment, plus they are quiet and durable. For years, headers and exhaust systems were made of mild steel. Then some aftermarket manufacturers began offering stainless steel versions.

Which is a better exhaust manifold 340 or W2?

The 340 manifold has very smooth, rounded corners and reasonably equal lengths. The first cylinder, on the left, is long and the last cylinder on the right is short, but they are much better than the typical log manifold. The original W2 exhaust pattern was changed to a wide-spaced pattern.

Which is the best header for a Mopar engine?

The typical shorty header or block-hugger header tends to be in the middle; it is an upgrade on the stock cast-iron manifold but not as good as an actual header. A number of factors need to be considered when selecting a header for your particular engine package and application.