1970 340 with x heads
- Thread starter Bgdude1
- Start date
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74 360 dart sport
Well-Known Member
What is the year and numbers on the block
Bore Scope
Snake camera, for your phone/ computer.
Snake camera, for your phone/ computer.
It is a 1970 date code, I’ll have to look to get the specifics.
Dartswinger70
Well-Known Member
it also helps if you know what the early vs later pistons vs aftermarket look like. The early have valve reliefs on one side the later 340 flat tops have them on both sides of piston The old TRW had a dimple for the spark plug etc. Then there is Sealed power and keith black etc. If it is an un molested 70 340 short block it should have the high comp pistons with valve reliefs on one side.
1970 340s:
Great picture! Thank you fellas so much. The engine has been modified at some point. It has an Engle KV-2 flat tappet cam and edelbrock rpm air gap, some other upgrades. I am going to purchase performer rpm heads and wanted to get the correct casting for low or high compression block.
That's a 12.5:1 TRW, not a stock piston. lol
Das more like it! Although it's a TRW replacement, it's still about the same as the 68-71 piston.
That's always been one of my dream builds. To build up a blueprinted 71 340 dead stock but with the 68 4 speed cam with everything machined to perfect spec and stick it in something light.
Never happen. LOL
Those are not stock 340 pistons.
We can dream caint we? LOL
yeah....i have a 340 with those cut down trw pistons in it....has not run 15 yrs...still a standard bore...
my 340 TA motor has the TRW flattops in ...just reassembled it last weekend and the heads are not on it yet...so those are fresh in my mind...
i answered that post with my phone and i could not see the other post....
my 340 TA motor has the TRW flattops in ...just reassembled it last weekend and the heads are not on it yet...so those are fresh in my mind...
i answered that post with my phone and i could not see the other post....
Dartswinger70
Well-Known Member
Not to hijack but is that 68 4 speed cam available? I run the Summit 276/288 duration 441/441 lift cam in mine. I seem to think that's "close" LOL! They are also very affordable. The 68 specs are to the best of my knowledge 276/284 duration .444/.453 lift but there is a caveat that duration isn't at .050 or something.
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Captainkirk
Old School Mopar Warrior
Yup. With a milled dome
That's what the TRW pistons in my 340 look like. I believe they were .025 above deck at TDC. Heads are Edelbrock 65 cc, can't remember the pn, to clear the TRW's.
Captainkirk
Old School Mopar Warrior
Here is what they look like out of the box...
Dartswinger70
Well-Known Member
I have an old set of TRW s that aren't that aggressive in the dome probably 1/2 that height I seem to think the number is 2332 or something like that.
Captainkirk
Old School Mopar Warrior
Dartswinger70
Well-Known Member
I am sure yes. They are old stock I bought the car in 93 they came with it. I had those pistons and a crane ssh 320 nc cam. I still have everything the cam is rusted and has pits though its a shame it seemed like an aggressive setup when I had it together. i wish I could still run that cam. i suppose i could but I fear the cam would start coming apart in small metal shavings as it has pits in the lobe surfaces.
Put your glasses on.
Captainkirk
Old School Mopar Warrior
They're on...what am I missing?
Well no it's not. Those have been polished. But I see what you're talkin about now. Thanks.
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