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Sounds like you are on the right track. I did just balance my 340 flywheel and mcleod pressure plate as a unit and was surprised at how much weight it took to correct it. If the flywheel and clutch doesn't change the vibration, it is possible they may have messed up the calculation for the...

Can you describe the balance issue. Have you pin pointed it to the engine?

If you have the heads off you can measure the stroke. That will give you some more info. Did it come with a balancer? You can tell if it was a externally balanced from that. Likely if it is an aftermarket steel crank it will be internally balanced

They have a passage under the plenum that flows engine coolant through. Common mod to these was to block that off with epoxy. It goes against the thoughts of keeping the intake cool for max HP.

I haven't seen the tool, but burnishing a bushing usually requires the tool to be drawn through the ID of the bushing with the bushing in place. It deforms the bushing into the bore. It sizes the ID as well as fits the OD to the bore. Thin walled bronze valve guides are fitted and sized this way.

Do jesel and t&D make w2 rockers for the econo heads? They do for the race w2 heads. Harland sharp does for sure make a set for the econo heads.

Another thing to be aware of is the bushing to oil pump shaft clearance. It might be too tight. Without the oil pump and cam in, the distributor drive should spin freely, if not it is too tight. Sometimes you will need to ream the bushing after it is installed in the block. I installed a...

I am sure there is horsepower to be saved. Likely why the current trend of 5W20 oils in the new vehicles. Closer tolerances made this possible, and fuel saving would help the corporate average fuel economy

post up pictures of the mounts and we can comment on whats what.

Possible ignition misfire?

Google search "Chrysler Conqueror Super bee III" Then you will want one........

The heads will have valve rotators in place of the regular valve retainers. They limit the amount of lift you can add to the cam. Also I think the heads might be a 318 small port head as well, check the #'s.

If I remember its is under engine swapping section in the mopar chassis manual. It shows the crank centerline measurements

The mopar chassis manual has some of this information.

The other thing that might be an issue is the thickness of the 8 bolt flange. The picture looks quite thick. Years ago a buddy was looking for a 426 hemi crank (which is stock with an 8 bolt) and found a 413 forged truck crank with the 8 bolt flange. But the flange was much thicker on the...

I had a poly crank and it was 6 bolt, forged, but had some xtra pieces on the throws were there was no regular counter weight. was from a 66 Fury. Tossed it as a bearing was spun.

I ran stock rockers and pushrods in a 360 magnum circle track car. I had a hughes hyd roller .580ish lift, and 2.2 Litre retainers with the Mopar performance valve springs. I would have valve train issues if I spun it up past 6000 rpm. Likely pushrod flex would take the rocker and pushrod...

sounds like you should post some pictures for the curious!

Sorry reading it on my blackberry, missed that part. Should be 68-71

Just to add to this comment. If is is a 68 340 the pistons will stick out of the block at TDC. The magnum heads are closed chamber. The pistons will hit the heads. Even if they don't quite hit the heads the squish area will be way too close and the compression will be through the roof!

Quick way to tell is the harmonic balancer on the front of the engine. If the ring is not symetrical all the way around, it is a 360. the 360 is externally balanced so there is an imbalance built into the harmonic balancer.

not trying to pick the car apart, just trying to help with your decsion. And give you some things to look over. - the bucket seats look like they are from a 71 - the rallye dash should be black where it is silver and woodgrain where it is black (is it out of a eary b'cuda? - 70 duster 340s...

LA covers fit on magnum heads with a little tweaking. The 5 holes line up. Not sure if it will seal with the magnum covers on the LA heads.

you also will need a pilot bearing to go into the end of the crankshaft. I have done three 360 magnums into my stockcar and did not have to trim the end of the input shaft on the A833, but maybe there are some differences in some crankshafts where this is necessary. I had an issue with using...

The mopar hyd roller lifters I have used have the oil hole facing up (or down if you put it in the wrong way). Not sure what type you have with the oil hole parallel to the roller, are they afertmarket?

I am not trying to start an argument, but I didn't want 70DusterDev to think he needed to rebalance his rotating assembly. He can simply modify his neutral balance flywheel to work with his exernally balanced cast crank 340 engine. The same can be applied to a 360 LA or 360 magnum just the...

If you are on a budget and the engine needs nothing else (cylinder walls are good), I would just cut the pistons down to the stock 340 height (i think it is .040" out past the deck? I can verify this if you do it to get the compression down) The difference in balance will be minimal and not...

or propane!

70DusterDev is trying to make a 340 cast crank flywheel, not rebalance his rotating assembly

I haven't done this with a 340 cast crank and flywheel, but I did do it with a 360 (it required more to be removed) and it worked fine. I also worked out the imbalance on a 360 magnum and did the same on a flywheel and it worked fine. So go for it!