My 1968 Z28 07C, 06-19 engine build, has the stamped steel hold down.  The hold down and the bolt were painted silver.  Apparently they were painted with a brush as there was some silver paint on the distributor wire.  It doesn't look like it was sprayed on the wire, it appears that a paint brush left the paint.

Agreed on the lift hooks.....was reading over on the Supercar Registry last night and got a good education.  But, back to Jimmy's question, it still appears that there was at least two different length bolts and the possibility of different head markings.

Chick....I could not find any shouldered bolts on my intake setup.  Go figure.....who knows what happened.  Good photo of the bolt....thanks for showing what should be there.

So were all the bolts used on the intake manifold the same head marking? I removed some recently that have no marking at all. Then they would not be original I assume? The motor had minimal work done to it before my ownership, so I would not have thought these to be replaced?  Hex head and Had washers underneath as well. Guess the washers prevent damage to the aluminum of the manifold.

Jimmy one other thing on the manifold bolts....my understanding is that (and it may be wrong) the manifold bolts were first installed at the engine plant and they were all the short ones.  When the engine arrived at the auto assembly plant dress line, the short bolts were removed and the other ones added as the equipment was installed.  Thus, you could have different head stampings because you are dealing with two different plants.

Oops, forgot something, the AIM states that the orange alternator bracket on the '68 Z28 was part of the engine assembly (wouldn't apply to a '69), so this item might get a longer bolt at the engine plant. Also the AIM states that the spark plug wire towers were also part of the engine assembly, but these were thinner so maybe they used the short bolts. I haven't been able to determine where the engine hooks were installed, at the engine plant or the assembly line dress plant.  Maybe someone else might know for sure.

On the lightning thing, my wife and I just moved into her parents house after her dad passed 2 years ago. They put it up in 95 and I noticed they had these metal spikes running alone the roof top so many feet apart with a huge braided cable going in the ground. I have heard of these things but never really knew/know if they really work. Do they?

Gary...I don't know about the older house grounding setups but I worked for A T & T for 35 years and in their buildings every metal piece in the building was grounded to earth ground by heavy wire.

  There was what we called a "Ring Ground" system that consisted of heavy copper wire that ran around the entire inside perimeter of the building and every metal piece inside and outside of the building was connected to this Ring.  This wire was in turn connected at various intervals to a corresponding buried wire that ringed the outside of the building that in turn was attached at various intervals to long copper ground rods driven in the ground.  So  A T & T did indeed believe in a lightning ground system....it had to be that way in order to keep the lightning out of the electronic equipment.

So were all the bolts used on the intake manifold the same head marking? I removed some recently that have no marking at all. Then they would not be original I assume? The motor had minimal work done to it before my ownership, so I would not have thought these to be replaced?  Hex head and Had washers underneath as well. Guess the washers prevent damage to the aluminum of the manifold.

Jimmy....there were two different lengths of intake manifold bolts that I know of and each of them had different head markings.  The short ones were used on the manifold holes that had no other parts attached or thin metal brackets and the longer ones were used on the holes with thicker brackets attached to the manifold...such as the smog bracket, lift hook, and alternator bracket.

For the small population of original cars I've looked at it seems many 69's and later (70 LT1's) had natural lift hooks. There was a real debate about this on the Yenko site sometime back. On our 68 I have them painted but here is a late Sept. 69 built Z/28 survivor with no paint.

From the pic you posted there is silver paint still on that bracket.

That was what I thought also.....looks just like mine before I cleaned them.  Another thing about the aluminum silver painted distributor hold down and bolt....they weren't to neat about painting them, apparently they used a brush as there was a lot of brush applied paint on the distributor wire.

Lift hooks on engines with aluminum intakes are known to have been brush-painted to match during assembly.

My 1968 07C z28 lift hooks were painted aluminum.  Also, what was strange was the intake manifold bolts.....they were standard phosphate coated bolts that had been painted aluminum, even the lift hook bolts were standard hex head bolts painted aluminum.  They must have run out of zinc plated ones and used what was available and painted them later.  Also my distributor hold down and bolt was painted aluminum.

My 1968, 07C, Z28 has a "C".

I noticed that you have the number "26" in grease pencil on the spare tire....do you also have the same number in grease pencil on the firewall and inside the front lower valence panel.  My Z28 has the number "22" inside the spare wheel and the other places mentioned.

Can you post the length of the valve stem also - from the rim to the tip?  Thanks

FYI....my original 1968 Z28 spare tire's valve stem is 1 5/16" from the rim to the top of stem.  As far as I know the stem and valve cap are original.  The valve cap has a smooth top and has a "S" inside the cap.

Would show my jack date but it wasn't stamped very heavy and you can barely make out a piece of the numbers.

I thought William covered that in the reply #15 above.

1969 Camaro Parts book -  #3847708 - 3/8" x 53 1/2"

1975 GM parts book list the number for the same specs as #9433759.  This number may be replaced as of today, but if you give them the specs listed above they can probably crossreference to the right size belt.

As far as I know , these are my two original front license plate to bracket screws.  1968, 07C car.

     

Yup....mine is.