It’s possible it was an over the counter replacement block but that is just a wild guess. Other than that, I can’t even come close to explain it.

 

Well that certainly makes more sense. I should have put my glasses on while looking at the pictures.

 

Yep, ‘73 block. Just curious, what are they asking for it?

 

I looked at that last week. Def. a 73 'but won't ship from Mo.

 

Being as it's a 73 cast date & it's measuring 4.060 on the bore, it needs to be checked over by a good machinist & then sonic tested to see if it will clean up at 4.070 or 4.080.

 

$400.00 Anchor

 

If you want/need a 340 block there is a vendor (Mega Parts) out of NW Wisconsin that have several 340 blocks on listed on various sites including FB Marketplace. They seem to be in better condition for similar money. Mega Parts has a website too with a lot of mopar restoration parts. I would think that they'd be willing to ship since it is a pretty good size business.

 

Whenever there’s that much rust, it’s rare to see one clean up at less than .040 over to get past the pitting.

 

I have a 273 block that would be a perfect candidate for a table base. That's pretty sharp.

 

Depending on the OP's location, there may be better candidates available.

 

I wouldn't pay $400 for that gamble.
If you found a non rusted standard bore block that passed a magnaflux and sonic test for $1,000 you would be money ahead in the long run if you must have a 340.
Good luck, and let us know how this turn out.....

 

I have some

 

I would not fool with that block.
Rough as a Corn Cob!!
You can find a decent one for a little more.

 

If some of you don't mind 8 sleeves I know where there's a sleeve to standard 340 block all machined and squared up and they want $1,000 for it

 

@tinman2 I'm curious why you disagreed? I've purchased small parts from them in the past with no issues.

 

Not worth it IMO. I don't think a machine shop would give you very good news after checking it out.

 

I wonder when they stopped casting them ? Would 2-7-73 be a late casting ?
maybe one of the last ?

 

55 gallon trash can, a couple gallons of molasses, and offer two hundred.