Search results for query: 340 manifolds

Y You say you removed the heat riser value from the right manifold. Did you plug the two holes from the rotating value?

I can't read the numbers clearly but if you can list them I will look them up for you.

Hello everyone, I have a 1966 plymouth barracuda that came with a 273 automatic two barrel. I did a recent build on a 340 and rebuilt my 18 spline automatic as well. I need to go into detail about everthing i did so you can help me with my question so you know what i got. I built this motor to...

The TTI head pipes are mandrel bent right off the 340 manifolds no pinch. They flow like giant over sized sewer pipes. TTI routes the head pipes differently depending on auto vs 4 spd. But either way a full 2 1/2 and no exhaust flow choking pinch. Dynomax Ultra Flo mufflers are straight...

I will be running 68-70 factory hipo manifolds. 2.5" Thanks Steve

The 69-70 manifolds are better than the 71+ manifolds. The passenger side 71+ exhaust manifold is less than 2 inches at its exit point.

I have for sale one set of exhaust manifolds. One side has 2863549 stamped with a date code of 0248. The other side has no stamping. There are no cracks/repairs. No heat riser.

Didn’t the dart sport 360s get 340 manifolds?

Yep, that’s what I have.

...now I'm leaning back toward an exhaust leak. I'm a rookie engine builder, and I'm thinking maybe here's my mistake. I read that these 340 manifolds didn't use gaskets, but had the heads and manifolds machined flat for sealing. I didn't do that, and instead added a smear of copper RTV to...

You young Bucs need to quit smoking that CLEAR. It is melting your brain. Headers are always an improvement over stock manifolds. I never lost a race against a car with stock manifolds and one of my early A-body 340 Duster s had flattened 2 pipes on drivers side and I still blew the doors off...

Like I've said before. Stick that 340 in an A-body with stock manifolds and exhaust pipes that need to clear torsion bars and the center link and see how much hp loss there is.

This was a pretty good episode. Nick took a stock 1972 340 and did a mild build on it. Stock was 8.5:1 compression and now it has 9.8:1. Some mild porting of the stock heads and intake valves are now 2.02 vs the stock 1.88. Stock cast iron intake, stock thermoquad carburetor. Unfortunately the...

Wow those look amazing! And far less hassle. The only thing I might have a little concern with is loss in horse power. I am building a nitrous motor. I went with a scat rotating assembly, 3.58" stroke crank all forged steal rods and crank , and forged aluminum "icon" pistons. I'm building this...

For all you guys running HP manifolds on their 340, wanted to know which of two filters to buy. The HP manifold and head pipe clearance is why I'm asking this question. Do not have head pipes to help me make the decision. May be a stupid question but here goes. 1968 340 application states...

To the original poster: Go old school, and just do some bolt on's. Day 2 ****. Look closely at this stock bottem end 318. Sneaky little teen, could put the smack down if your not ready. Wait a minute...HiPo 340 exhaust manifolds on a 318 ? :)

Looked like 340 manifolds

...and chamber. I installed 318 manifolds on my 340 when I first installed it in my van. I was not impressed with the motor change at first. Next week I installed headers, not 340 manifolds, What a big difference. I just read your comment again and maybe on a 318, but not a 340, sorry for the...

Well, I don’t know about that, I’m just putting it out there in case somebody wants them. No issues with the car, took it to HP Engines and had it stroked and got these back from Hollis.

All 340/360 4 barrel manifolds are very good. Take it to someone who can weld cast iron and get an estimate first, then you can make a good decision. For me that would probably be too much, but I have had exhaust manifolds welded with at least 40 years of service and still holding up fine.

Yes, that's the problem at the bottom of the port with stock replacement magnum heads. The 340 manifolds are a large LA port and the magnums are a small port head. I made some 16 gauge block off plates like Dion R made and they leak slightly around both sides of the plate. it's not much...

340 manifolds aren't exactly a clean fit in the early A body either, although they take less work than the Magnum manifolds. And then there's the port mismatch/sealing issues and outlet to head interference to deal with. And the cost. Magnum Heads On 340 Easiest (and since you're admittedly...

Price any 340 part or car. Last pair of 340 exhaust manifolds I saw for sale were like $400

The hp difference between 360 vs 340 manifolds to me aren't worth the swap. But like everything it's up to the individual.

Do you still need pictures? Cause my '69 340 has the manifolds bolted to it with reproduction hardware. But its under a table with blankets and plastic piled on it but I can get pictures if they still needed.

...dart with a 360 and power steering. Currently I have the 273/318 2780945 exhaust manifolds on it. Are the expensive 2863549/2863553 340 manifolds my only option? I do not want headers. Will those 68-70 340 headers work with power steering? Sorry, I know there are a few threads on here...

Just to update a bit, I took my 67 Barracuda to the strip a couple of months ago. I went from 13.70s at 98 with stock 340 hi-po manifolds, 2.25 exhaust and 3.23 gears to 13.07 at 106.5 with TTI headers, 2.5 inch exhaust and 3.55 gears. Both times through the mufflers. With a pretty dinky cam...

They were reproducing 340 manifolds a while back but thought I read repops not being made anymore? If so thats gonna drive the price up.

This will probably raise some eyebrows. If two 1973 duster's were the same weight, had the same size tires and tire pressure, both had 3.23 gears, a 904 transmission with a stock rebuild, stock stall speed converter, one has a 340 the other a 360 but they both are rebuilt to the 340...

My big fingers, I meant to say 340's