NOS Block 2468330-M ID?

I am being offered a NOS block with a Casting number of 2468330-M It has 8A23 with a 27 under it It is a 4.25" bore with 2 bolt mains. 413, 426 Wedge or a 440 block? It has the extra material around the Lifter bores. Thank you in advance. He is asking $2,000.00. PJ

What do the flat pad stamps on the top front of the block say?

I have to run to work and I will get a picture. I accidentally deleted my pictures on my phone's messages.

That block # should be a hemi or wedge mega block. They have cross bolted mains. If it has mopar cast on it is a siamese block if not a water block. That would be a steal! These blocks are both hemi mega blocks but the wedge would be the same.

Here are the numbers that I have found.

Thank you. It doesn't say MOPAR. The water block would be better for my use for sure.

H2499 244

H2499 244. Sorry I didn't do the Quote above.

That looks like a early Mega wedge water block to me
if you buy it I would have it sonic tested first before deciding what to do with it.
One of the local ex ,Mopar drag racers (he retired due to health reasons) had several of those blocks and had one split a cylinder wall bore out to 4.500, he ran several of the same blocks at 4.440 and didn't have any cylinder wall failures at that size
IHTHs

My guess is it's a P5007671 wedge mega block. Might be a unfinished block I can't tell from pictures if lifter bores are finished. It is a Motor Castings foundry block. It's the only one I found listed with 2 bolt mains. Zippy is the guy that would know more but I haven't seen him post in a while.

Mike

The extra material around lifter bores is normal for a mega block.

Thank you. As far as you know, can it be bored to 4.32 or 4.350 safely?

Thank you, much appreciated. PJ

So is the P5007671 a Max Wedge block rather than a 440?

[quote=PJSIXPACK So is the P5007671 a Max Wedge block rather than a 440?

No not neither. It's an RB performance block.

That is a 1998 casting.

Have it sonic tested first before deciding
One of my customers bought one of the early Hemi Mega blocks rough bored to 4.180, he wanted it to make it into a pump gas blown Hemi motor with a 10-71 roots blower with two big Dominator blower carbs, I had it sonic tested first and we decided to bore it to 4,25 and increase the stroke from 3.75o to 4.375 to get more C.I.
On your deal I would leave at least .200 wall thickness for future builds to start with
Check and think twice before deciding

Thank you.

So with it being rough bored from the Factory to 4.25 can I have it taken out to 4.32?

Thank you. I will have it Sonic tested before I decide to buy. Is the $2,000 a decent price for the block?

Aw thanks but you guys totally have it covered.

I'd have to dig through the basement to find any info worth mentioning on the old blocks, and other than foundry info
(which at this point is all trivia since none of them will do anything for Chrysler anymore anyway)
it's mostly stuff that's been posted here before.

PJ, there is a thread on here once a month about someone crying that they cannot find a decent aftermarket wedge block to buy and build. Then they ask if someone will ever cast them again. The answer is always, no. That is a good deal on an impossible block to find. Buy it. For $2000, you could sell it and make money. I’m surprised you have not got a box full of messages wanting to buy it already. In short, yes, buy the block.

Thank you for the input. I will tell him that I will take it. I have it in my garage now. He has been more than patient while I made up my mind. PJ

Thank you very much. I will purchase it.

Is anyone here using a 2 bolt main wedge Mega block? I think most guys are using the cross bolted blocks? I wonder how much less horsepower it can handle compared to a cross bolted block?

Nice thing about this 2 bolt block---being a common casting it can be machined for 4 bolt without removing too much material.

[b][/b]Thank you everyone for the advice and for clarifying what I have. Things have been really slow at work due to the GM strike and they haven't picked up much. Therefore I am going to sell the 1998 NOS Mega Block P5007671. PJ

What heads fit the P5007671 block? Do the 906's, 915's and standard 440 heads fit it?PJ