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Author Topic: 3917610 Intake Manifold Inspection Stamp  (Read 3360 times)
1968RSZ28
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« on: 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      
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1968 Z28
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« Reply #1 on: September 08, 2011, 02:47:44 PM »

How about an "8".
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Jerry G.

Z28-1968-07C-Norwood
Ermine White, Red Std. Interior
2nd. Owner, 38,000 miles
1968RSZ28
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« Reply #2 on: September 08, 2011, 03:01:55 PM »

How about an "8".

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

Paul
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68Zproject
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« Reply #3 on: September 08, 2011, 04:52:12 PM »

Mine has a 55.
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68Z28
1968RSZ28
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« Reply #4 on: September 08, 2011, 05:42:31 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
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ggtsvnv
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« Reply #5 on: September 08, 2011, 09:49:13 PM »

mine has a "V" on it
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1968RSZ28
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« Reply #6 on: September 09, 2011, 01:05:05 PM »

The intake from the spare '68 Z/28 engine I have is stamped with a capital V.     

mine has a "V" on it

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

Paul
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ggtsvnv
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« Reply #7 on: September 09, 2011, 07:54:09 PM »

My car is an O4A build date, VIN N407310

so a 15739 difference in the VIN
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ChrisM
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« Reply #8 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.
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68Zproject
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« Reply #9 on: September 11, 2011, 12:04:01 AM »

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.
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68Z28
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« Reply #10 on: September 11, 2011, 10:53:47 AM »

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