3917610 Intake Manifold Inspection Stamp

1968RSZ28 · September 08, 2011, 12:12:33 PM

The 3917610 aluminum intake manifold used on '67 & '68 Z/28s has a square boss on top of the coolant runner at the right front corner. Usually stamped on this boss is what I assume is an inspection stamp from Winters Industries. What I find interesting is I have not seen two manifolds with the same stamp. The original intake manifold on my '68 Z/28 is stamped with a capital U surrounded by a circle. The intake from the spare '68 Z/28 engine I have is stamped with a capital V. The attached photo is from an intake on Ebay now, it is stamped with a capital Y. I'm curious, what's stamped on your 3917610 intake manifold?

Paul

1968 Z28 · September 08, 2011, 02:47:44 PM

How about an "8".

1968RSZ28 · September 08, 2011, 03:01:55 PM

Quote from: 1968 Z28 on September 08, 2011, 02:47:44 PM
How about an "8".

Cool Jerry, that's another one I haven't seen before.

Paul

68Zproject · September 08, 2011, 04:52:12 PM

Mine has a 55.

1968RSZ28 · September 08, 2011, 05:42:31 PM

Quote from: 68Zproject on September 08, 2011, 04:52:12 PM
Mine has a 55.

Wow, first double digit number stamp I've heard of. In fact, I haven't seen a double character stamp either.

Paul

ggtsvnv · September 08, 2011, 09:49:13 PM

mine has a "V" on it

1968RSZ28 · September 09, 2011, 01:05:05 PM

Quote from: 1968RSZ28 on September 08, 2011, 12:12:33 PM
The intake from the spare '68 Z/28 engine I have is stamped with a capital V.

Quote from: ggtsvnv on September 08, 2011, 09:49:13 PM
mine has a "V" on it

We have a match! First one I'm aware of. How close is your VIN to 8N391571?

Paul

ggtsvnv · September 09, 2011, 07:54:09 PM

My car is an O4A build date, VIN N407310

so a 15739 difference in the VIN

ChrisM · September 10, 2011, 07:05:03 PM

Mine is not stamped on the right front corner. Instead it is stamped 55 on the on top of the square boss of the right middle coolant runner. I don't know the date code of the intake or anything about the car it came off of. I just have the intake. I've owned it since 1986. Hope this helps you.

68Zproject · September 11, 2011, 12:04:01 AM

Quote from: ChrisM on September 10, 2011, 07:05:03 PM
Mine is not stamped on the right front corner. Instead it is stamped 55 on the on top of the square boss of the right middle coolant runner. I don't know the date code of the intake or anything about the car it came off of. I just have the intake. I've owned it since 1986. Hope this helps you.

That's exactly where mine is stamped 55 at.

Classic Gary · September 11, 2011, 10:53:47 AM

right middle coolant runner, can we get a pic please?

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3917610 Intake Manifold Inspection Stamp