There seems to be a legitimate contradiction here...

Could the cut off date be questionable, too?

The cutoff I'm pretty sure is an absolute, BUT it's just a matter of looking at the webs .

I agree, John. It's a simple thing to check. I wouldn't turn my nose up at either one.

I just don't want to start a peeing match over the font issue.

"Always trust the font!"

Don't worry you can have a peeing match over almost anything

I've got a favorite 400 I've saved for years. 6. 15. 71. large font. now you guys got me worried. gonna measure bore ,make sure its not a 383.

TO the OP: AndyF who has 10 400 blocks, lives close to the West Coast. Maybe shoot him a PM and see if he can help you out?

R.

It's not like that would be a problem , it's a 400 CORE ...

No need to measure, just look at the engine ID pad. It'll tell you how the engine was built.
If it is indeed a 230 block 383 it's probably worth a bundle to the right guy.
R.

I finally got a chance to look at that block.400 230.2! did notice bowtie cooling holes in the decks. I thought that happened later in the70's my 72 440 sitting next to it has old style round holes. strange

I learned a long time ago to never say never with any car parts, especially Ma Mopar cars

i think i might have too. the member on here has opted out of selling me any of his blocks now. so frustrating being down under, mopar was not the big hitter like it was in the US so tripping over blocks in the woods was never a possibility. guess i'll have to put my sad face on & try & see if Andy can part with one. i have dealt with Andy before & bought a balancer off him so at least he knows i'm genuine & not some scammer.

I just checked my 230 block. 12-3-71 and large font.
Don't have it apart yet so don't know which block it is.

the original seller of the 400 block i was chasing has decided he will sell it now. so i asked for a zxillion pics, he sent me two. those of you that know your stuff, what can you decipher from these? i think i need more pics.

Looks like a good one to me
read here:
http://www.440source.com/blockinfo.htm

that's too late by the dates I know of to be thick web, but will be interested to know what you find.

No need to go to the website, easy to see it's a thick web.

Now what do the cylinder thicknesses look like ? But even so considering his location , sleeve the bad holes ...

That is a thick web block. Question is what is the bore size? Did he measure the bores?

bore size is 4.25 Andy, still don't know the casting date. i'm pressuring him tho so hopefully i'll know soon.

4.25 is bizarre. What size bore do you want to run? If you're thinking of boring it to 4.375 then you better have it sonic checked before you buy it.

I just tossed a 400 block on the scrap pile because three of the cylinders had 0.090 or less on the side wall. This was a super nice looking block that had already been dipped and magged and had some machine work. It would have been easy to sell for a premium price but when I looked at the sonic numbers the value dropped to $0 and it went on the scrap pile.