Search results for query: 340 manifolds

273 manifolds work on the 2bbl, small valve heads, and they choke about the same time or a lil before the 2bbl cam does. The 340 logs work with the big-port heads and the 4bbls, but they kill the overlap on the 340 cam. They say, that headers allow the 340 cam to come alive, which can add quite...

Be aware that some Magnum heads don't have enough material around the port to seal a 340 exhaust manifold. Not all, but my R/T heads and some OEM heads I have seen can be a problem. https://www.forabodiesonly.com/mopar/threads/340-exhaust-manifolds.437577/#post-1972547765

At first I was skeptical about gaining 20hp on a ‘73 2-barrel 318 until I remembered that back in 1973 a friend of mine had a ‘73 340 Duster automatic and I had a ‘73 Dodge Sport 318 2-barrel 4 speed. I added dual exhaust to my car and put lighter advance springs in the distributor and it seemed...

...you have the big port 340/360 type heads, get a set of 340/360 A-body stock exhaust manifolds if this is just a street car. The '68-70 340 manifolds have the best flow, but, are also the most expensive to buy. The '71-6 ones work fine too, just a bit worse on flow. Some of the '75-6 castings...

I've always run 2 1/2" with manifolds or headers (street cars). I just received my TTI 2 1/2 system for my 340 Swinger. When I look at the size of the pipes (except where they smashed it to fit around the starter) I can't believe this wouldn't be more than adequate for any small block up to...

Yup, when the time comes i'll install them.The complete exhaust came off a 340 Dart with the same ...549, and ...553 manifolds that i will use. The previous owner/friend restored a show quality numbers matching 69 340 4speed convertible. I think there may only have been about 50 of those cars...

and that's why I'm retaining my factory 340 '69 cast iron manifolds when I go to the MP 1.14's

No I have a real car, you have me mixed up with a guy called Dan. I also have a,set of mint costed 68-71 340 manifolds from my Challenger. I ran them on my De-Tuned 340. As I pulled the big cam, springs, high stall, and put better street gears so my wife coukd have A/C and go anywhere. Had...

Thanks, I can see it is bent some but no where close to mine. But is is not a straight up.

I have a second set of 340 exhaust manifolds no repairs Nice condition 650 plus the ride in Crossville Tennessee

That's awesome

Looking for some recommendations on a good performing intake manifold for my 340. Here are my specs. 71 340 .040 over. Keith Black pistons KB243 Comp Cam 2705 270/270 Duration .468/.468 lift 110 centerline 360 heads 2.02/1.60 Stock crank, stock rods. Hooker headers 904 transmission with...

For sale one nice used original set of 1968 through 1970 340 HP exhaust manifolds..... Heat riser is there and stuck open..... Little to no pitting on these nice shape....no visible damage anywhere that I see !!!......$800 plus shipping in USA located ny state 12306 zip

Nice! And I bet it sounds sweet.

Cmon man, you got to be joking.

back in october nick's garage dyno'd a 318 stroker, 10.5:1 with the small valve 360/340 heads that had been ported and bigger 2.02 intakes put in (allegedly), comp XE275HL 528 231/237, stock hydro rockers, performer RPM with a 750DP, running thru manifolds hair over 400hp @ 5500 about 440tq @...

Got this in a swap lots of cracks Wasn't too interested till I found out it's 68-70 340. Isn't this the best 340 manifold or was the 71 better Looks like someone attempted a jb weld patch on the back of the manifold I have never seen a manifold crack this extensively Not concerned that it...

ive used a couple magnum 5.9s. An LA 360 car pan works. I used an LA timing set. I did use the magnum accessories to get the serp belt set up and higher amperage alternator.I used la headers on magnum heads and magnum headers on la heads. no leaks.

I run the factory style Commando/Charger exhaust on all my 273's from mild to wild, factory exhaust manifolds and all. Combinations ran from stock Commando, to 284 duration solid cam with an Offy intake and Holley carb, to "72" 340 heads and cam with a 71 340 intake and TQ. I am also...

i had stock converter, 2.76 gears and stock exhaust manifolds. Again, not what I recommend but it's what I did.

i collected a lot of money off of the unsuspecting with a 318 that just "had headers and a 4bbl" and looked to be the brother from another mother to that motor, right down to the parts store special chrome air cleaner. agree to the day two action. throw mellow little cam and intake at it, snap...

Two problems. 1. Not sure you can determine the port size form the gasket alone. 2. The port you care about for performance, is the outlet. The 340 and "good" magnum manifolds have the larges outlet. Sounds like you've already talked yourself into using 318 manifolds, so carry on and enjoy.

Put in anything you want. Manifolds will just hold you back after you get past a 340 spec cam.

Here's what a 360 Magnum looks like dressed like a "day 2" 340. I used all LA front, including alternator, all brackets, power steering ,pulleys, valve covers etc. One ***** was to get the bypass hose to fit. Also getting a lower rad hose that worked properly. Let me know if I can help further.

About 1978, put a set of cheap BlackJack headers on my otherwise stock 73 Duster 340. They leaked, rattled and hung low, but the car ran almost 3/4 of a second quicker in the quarter, even with a traction problem it didn't have with the stock manifolds.

i have a 72 roadrunner 340 engine sitting on a stand, but never paid much attention to the changeover,, thanks for the heads up. regarding early blocks in later cars, I helped junk out a 1974 charger R/T 440, and it had the 440 with casting date of jan 1971. Apparently there was a bunch of...

Step headers? That's a new one on me...it looks like I have some Googling to do. :)

For sale nice used set of 68 through 70 340 HP exhaust manifolds.....this set also minimal pitting .....but has had heat riser removed and bolts put in holes ....no visible damages ..... thanks fabo .....located ny state 12306.....$700 plus shipping in USA

Slight correction. The hole is 2-1/8 on the mag and about 2-1/4 on the good 340 units.

Here's a low cr 2bbl 318 with headers dyno's 182 hp, even if you add a decent amount of cr you get a 3-4% power increase so 190 hp with headers. https://www.motortrend.com/how-to/mopp-0312-318-long-block-bolt-ons/ Here's a low cr 360 at one point around 3:45 time mark, stock low cr, 1.88...