Engine stamping...comments ?

[Enoch]

Charley, can you post a picture from the front looking down the deck surface to see if the deck surface level changes.

[Charley Lillard]

No I can't but the deck level does not change. Those are orig broach marks.

[Enoch]

Is this a LA car?

[Z28DZ]

[ QUOTE ]
Is this a LA car?

[/ QUOTE ]

It is an LA built Z28.

[Enoch]

The motor and trans were ass. the same day pretty neat! And it's a M-20 that's good to get the 302 outa the hole.

[DarrenX33]

This is off my Norwood build Z. The VIN is on the side by the filter.

[Enoch]

See my post here Engine stamp data base

[Mr70]

It also looks like Flint used the number 0 & the letter o,as well as two different type set number 2's.

[Zedder]

The deck surface and engine assembly date and code look OK to me. I'm seeing more and more "deep" broach marks in '69 and '70 cars than I usually see in '67 cars...not sure why that would be, but it is definitely very noticeable on many Tonawanda BB's. I can't comment on the VIN derivative as I don't follow '69 Camaros.

I also think that improvements in digital cameras are giving us much more definition than years past and this is raising concerns unnecessarily in some cases.

[TimG]

Here's what I've heard about broach marks. As the broach machine lost its sharpness, the cutting edge or edges were sharpened. When the broach was sharpened, they would surface the hi performance blocks first, this could mean that they would surface the four bolt main blocks first since they were going to have a higher compression.
I don't know if this is true or not, but the broach certainly would wear down leaving different types of broach marks. I've always noticed more of a pattern on big blocks than small blocks.