I get it. I think it is mostly an academic argument these days.

If you believe the 010 block is the better block, no big deal; there are many more of them sitting around than any of the earlier blocks in the 60s. On the other hand, if you are restoring a 67 model Chevy, they you are pretty much stuck with an earlier block, right?

I will admit that virtually every sbc I have built for a non numbers car used an 010 block as the foundation, unless using an aftermarket block. Last one I bought, I paid $200 for the engine, less intake carb and distributor, and it came with an engine stand. Plentiful and cheap.

correct me if I am wrong however I do not believe it can be 634527 with a may 12 casting date.
633599 was an 04C. April 23rd IIRC

You are correct. second digit of the sequential part of the VIN would be 5, 6 or 7.

I know a lot of guys don't think it could be an August car, but because of the extended production, lots of August cars (especially the first two weeks) have May or June components.

Graeme may be right. It is just another 010 block. However, the big X factor would be finding a car that matched the rest of the VIN, and the car turns out to be a Z/28. Would likely be an X code car, being that late (chances are 2 in 3). Even a slim chance the car and the block could be re-united.

Mark, I know you tried to bring up the stamp on the pad. What about that part of the block, trying to determine the second digit?

Wouldn't hurt to get the shipper docs from NCRS. I would if it were my block.

I went and looked closer at this.
Its most likely 19N654527 and out of a June car. 19N664527 is also June but engine dates were farther along by then, but I guess it could still be considered.

As far as what you say about August, I am not seeing that in August cars

06A on trim 519DZ and 657274 per the POP

Pretty sure nearly all, if not all, June tags were dated 06A.

I guess I missed this. Where is the info on the POP?