Date codes on manifolds

[BIGSHCLUNK]

This may be a question for Barry only. But how do I check date codes on these exhaust manifolds??
THANKS

[Alaskan_TA]

You have to find them first. ;-)

Some of them can be hard to read on manifolds because the rust pits can be deep.

Take closeup photos of all the numbers you find & post them here.

[BIGSHCLUNK]

These are actually not real rusty, I'll get mote pics tomorrow. But here's what I got. Thanks Barry!

[72rtchallenger]

drivers side 2780508 is off a 1970 426  hemi

[Alaskan_TA]

2780501 1966-69 B-Body

2780508 1966-69 B-Body & 1970 E-body

The date codes are normally much smaller.

[BIGSHCLUNK]

There are spots with a wierd lookin number. I'll post tomorrow Barry, hope my camera will go small enough.

[BIGSHCLUNK]

Barry, here's what I could find!  Looks like 13FA  &  80A    Couldn't find anything else.

[hebeegbz]

2780501 1966-69 B-Body

2780508 1966-69 B-Body & 1970 E-body

The date codes are normally much smaller.

My parts book agrees .

[Alaskan_TA]

I can not read the date codes on my 340 manifolds either, they are too faint.

I do not know what the other numbers you found mean, if anything.

[BIGSHCLUNK]

Barry as always I appreciate your help. I didn't think that meant anything either.

[hebeegbz]

Sand cast they re tag each cast repair and or mod .these also tell the foundry a date along with casting info .every single part bar -none on every car has a cast code even plastic that will tell the maker time date and tooling . a totaly striped car with only 3 removable parts lets say heater box one a pillar plastic and tail light will tell an average time of build much the same as a block & trans combo.

[BIGSHCLUNK]

Cool info, and it makes sense.