How much should a basic 340 rebuild cost?

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Well, I can tell you that is a bit low. Machine work is a killer. Plus the parts are over the top. But I guess if you already have a good running engine that just needs a refresh it would be about right... without labor.
 
Depending on where you are I'm gonna say it's probably at least 7-8 grand to rebuild an older engine to stock specs. I'm talking about having a shop do full rebuild; tear down, hot tank, inspect and measure everything, replace the really worn out parts and/or clean up/repair as needed, re-clean everything, install cam bearings/freeze plugs, build the short block, degree the cam, refurbish the heads with a valve job, new guides, seals and springs, set up the valve train, all new gaskets and seals, time it, paint it and send it off.

And that's if you can even find a regular automotive machine shop anymore... there are zero in my town now and there used to be several. I know of one guy a few towns over but he sends a lot of his stuff out. Shipping heavy engine stuff costs a fortune by itself.

When was the last time anyone had a crank reground or had a set of connecting rods re-done? Block machining is always worth doing but beyond that I'm not sure it makes much sense to put money into refurbishing stock parts anymore. I am a vendor at Carlisle and the last several years I can't even give that stuff away.

Kind of a dying art these days unfortunately.
 
my 340 is in the machine shop now for a stock rebuild, i gotta tell you its adding up fast.
I will probably end up in the $7-8K range, that will include assembly and dyno.
I will report back with the cold hard numbers when its finished... hope this helps...Rich
 
^^^^ There you go! ^^^^ I do the engine work myself. Parts and machine work I have to get done. But I do have a place close that has been there for over 70 years. Hell two of them I know are in there upper 70's. They just can't stop. Bless them. It's crazy now what engine cost. But then again the stuff we play with is getting used up.
 
I suppose the thread being so old is why no one mentioned Trick Flow heads over Edelbrock. I don’t think you get that much of a boost from stock Edelbrock’s. My ported J heads flow better with 2.02 valves and a 70 degree throat cut. If I go to aluminum I want something for my money except shiny.
 
Assembly should cost about $400 to 500 bucks tops. Custom builder, more.
Figure about $900 in parts for the bottom end, about 1500-1800 in Machining Maybe, including parts for the heads. Using performance parts, more.
Talking basic here...give or take 300 bucks.
 
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fishmens67 said:
I was thinking around 600, either way I'd say a stock rebuild should run about $5500 max
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Used to build them for about $2,200 bucks. In fact I remember when the Machine Shop bill was about 1200 and the rest was all parts and my assembling it-that is, my own stuff.
 
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Spadman said:
I suppose the thread being so old is why no one mentioned Trick Flow heads over Edelbrock
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No I only did this so people would realize what it cost now. Not doing anything than making a fresh engine. Don't put new heads it there it mucks up the flow.
 
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MOPAROFFICIAL said:
Used to build them for about $2,200 bucks. In fact I remember when the Machine Shop bill was about 1200 and the rest was all parts and my assembling it
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Should be able to build a good little engine for $5500, better than factory and more horsepower.
 
fishmens67 said:
Should be able to build a good little engine for $5500, better than factory and more horsepower.
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I'd hope so, maybe even a little more than stock if you know what you're doing. There's a machine shop here that'll go through the heads, reface the valves, new guides, hard and seats and everything for about 4 or 500 bucks and then they charge about $450 bored honed cam bearings and freeze plugs to do the block and then they charge about 200 bucks to do the crank and they charge about $1o0 to do the rods.
 
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