Topic: 69 mach 1 - is this a numbers match?

[rindel]

Hi, i attached pic of what is legible from my 351w engine stamp and typed in relevant numbers from my vin above. How do i know if i have original engine?

[70cj428]

Not that it means a lot, But I'd accept that as the original engine.  Most people that restamp parts do too good of a job ....

[69GT350H]

Mine only has the last 6 digits. It's a Dearborn car.

[J_Speegle]

Hi, i attached pic of what is legible from my 351w engine stamp and typed in relevant numbers from my vin above. How do i know if i have original engine?

Good start. Would suggest you check the casting date of the block also if it fits well with the cars real build date (from the Marti report) then I would feel comfortable at claiming that block was original to the car. Can't make the claim for the whole engine without checking the rest of the stamped and casting dates from that item

The picture does need a little bit of documentation - where did you find the numbers stamped on the block? This will help other 69 351 owners with cars built at NJ

 

[rindel]

See a more zoomed out pic of the eng. location was back of engine by flywheel.

[rindel]

i have tons of engine pics so i just need to know location of casting dates on block

[rindel]

Is this the casting number?

[rindel]

and this number as well.  The original owner said it was numbers matching but I could never really prove it until we had to removed the engine to replace the pistons.

[J_Speegle]

and this number as well.  The original owner said it was numbers matching but I could never really prove it until we had to removed the engine to replace the pistons.

That is the casting number (one under the larger engineering number)

[Bob Gaines]

That is the casting number (one under the larger engineering number)

I believe Jeff may mean casting "date"(a typo) which is the one under the larger engineering number casting. That would be the approximate date that the engine block was cast in the mold.

[rindel]

The one that reads C90E-6015-B?

i searched the internet to decode this to "C9OE-B – 1969-1970, 351 Windsor small-block, 2-bolt mains"

[J_Speegle]

The numbers and letters below are the ones needed the upper one doesnt' help much

Looking at what I can make out do we have a 8H or a 8M  followed by a  13 or19 or something like that?

You would be the best one to tell since you can look at it all from different angles



Given the VIN from NJ plant that would place the car possibly being finished in early Feb 68 making a December 68 cast block (if the letter is an M) a decent fit to other patterns we've seen

[rindel]

thanks i will take a closer look and report back

[rindel]

My marti report says the following. So would you say its original engine?
scheduled for build: feb 10, 1969
Actually built feb 7th 2 days ahead of schedule.

[J_Speegle]

The existence of the car's Vin would suggest that the block was original to the car. You would want to check all the attaching parts to confirm that the complete assembled engine was all original or at least in the date range before claiming IMHO that the engine was original or "matching numbers" if that was the term you wanted to use.

Ever get a chance to look at the block casting again and that will help with dating the rest of the parts and the assembly date