Stock 340 Rebuild

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4spd340Swinger

4spd340Swinger

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I have a 1969 340 in my Dart that I am going to pull to freshen up. Runs fine but I don't know the history of the engine . Other than getting an equivalent 68 340 4-speed cam, I will be going back stock. Where would you recommend to source parts. Mancini? Thanks for all your input.
 
4spd340Swinger said:
I have a 1969 340 in my Dart that I am going to pull to freshen up. Runs fine but I don't know the history of the engine . Other than getting an equivalent 68 340 4-speed cam, I will be going back stock. Where would you recommend to source parts. Mancini? Thanks for all your input.
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I've dealt with Mancini and their service is excellent!
 
I will be watching this, i plan on doing a stock rebuild of my 69 340 with that same cam, i will also be useing a LD340 intake also.. I hope parts are available....Rich
 
I'm in the midst of a stock 340 build right now. My Mancini parts arrived today. I like them for engine parts as they have a wide selection and one stop shopping is important to me. I do buy some name brand stuff local if it is stocked because it is cheaper with no shipping. I bought the '68 repro 4 speed cam from Oregon cam with lifters for under $200 USD with no core supplied.
 
4spd340Swinger said:
I have a 1969 340 in my Dart that I am going to pull to freshen up. Runs fine but I don't know the history of the engine . Other than getting an equivalent 68 340 4-speed cam, I will be going back stock. Where would you recommend to source parts. Mancini? Thanks for all your input.
Click to expand...
Summit Racing
Order it all at the same time and get free freight. Their customer service is second to none.
 
I would pay attention to the weight of the piston you put in there. Stock 340s have extremely heavy pistons from the factory. A lot of aftermarket pistons are lighter. Lighter pistons will relieve stress on rods crank and give a faster rev'ing quicker car.
 
Flat top hypers, pictured below, the clay clearance with ProMaxx (Edelbrock) heads and no gasket, plenty of room.
There is a portion raised approximately.060. The outside circumference is at zero deck.
PLYMOUTH KB KB243.030 Keith Black KB Performance Pistons | Summit Racing

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1MeanA said:
I'm in the midst of a stock 340 build right now. My Mancini parts arrived today. I like them for engine parts as they have a wide selection and one stop shopping is important to me. I do buy some name brand stuff local if it is stocked because it is cheaper with no shipping. I bought the '68 repro 4 speed cam from Oregon cam with lifters for under $200 USD with no core supplied.
Click to expand...
I think they are who I am going to get my cam from also.
 
I just reused the 0.040 over Silvolites because this is supposed to be a low buck stock build (hahaha). Mill the heads and replace the valves with nail head valves and I should get around 10:1. I saved on pistons and rebalancing... got to draw the line somewhere. I still spent $2k at the machine ship with cleaning, honing, cam bearings, rings, bearings, crank grind and rod resize. If you are going a little deeper I would do the KB243 pistons (as mentioned) and rebalance (and get aluminum heads) ..... there I just spent $4k more for you. :)
 
I would also recommend FelPro Performance head gaskets that are .039" thick. The standard FelPro head gaskets are .054' thick. So I would pay attention to head gasket thickness too....
 
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