Block Casting Date Question

[Ralph P.]

This ia a 67 3904351 block from a mid-January car. Pad and and transmission dates line up within 30 days prior. The block cast date is the question.... should be December 66. But,the "L' character appears reversed. Is this somethins seen since it was a manual process? Are there other known blocks in with this error?

[Jimmy G.]

Re: Block Casting Date Question

Looks like F176 possibly which would be WAY early. With GM anything is possible Upside L possible Your guess is as good as anyone's

[Keith B.]

Re: Block Casting Date Question

you need to hunt down other blocks cast on the same day. start with finding cars built the same day as yours and finding assembly stamps that are close. be like finding a needle in a hay stack though

[Ralph P.]

Re: Block Casting Date Question

Yes, hoping someone will pop up here with similar date !

[Keith B.]

Re: Block Casting Date Question

Have you gotten in contact with Al Greening he has thousands of stamp pads and casting dates on file.

[Patrick B.]

Re: Block Casting Date Question

351 blocks were definitely being cast on June 17, 1966, and this appears to be one. What is the assembly date? Sometimes there were gaps of 6 months between between casting and assembly of big blocks. Post a picture of the pad.

[Ralph P.]

Re: Block Casting Date Question

Posting for a buddy... Assembly date was 1/04/67.... Will see if I can get pad picture. Thanks

[Mark L.]

Re: Block Casting Date Question

My 1967 427 car had an engine ass'y date of 1/4/67. The cast date was J206.

[Patrick B.]

[Ralph P.]

Re: Block Casting Date Question

Good idea, I'll try to get a photo of his pad ! Still need to determine if an L or other character? Up close, really looks like an inverted L....

[Gary J.]

[Mark L.]

Re: Block Casting Date Question

Pat, here it is. One of the mechanical judges was Al Grenning when it got the Duntov Award.

[Patrick B.]

Re: Block Casting Date Question

It looks real good. Hopefully, Ralph can post a picture.

[Ralph P.]

Re: Block Casting Date Question

Great looking pad.... I hope to have a couple to compare today. I do have a couple more of the casting date to post. Do we for sure know 351's were cast in mid June? It sure as heck looks like an inverted "L".

[Ralph P.]

Re: Block Casting Date Question

Here's couple more of the block cast date....