Z28 cowl paint (and Z11/Z10)

[X33RS]

So that makes 2 December cars with only a single PTB stamp.  We might be on to something then.  Mine is only on the right hand side though.  I see nothing at all behind or around the booster anywhere.

The Silver car I posted is a 12C with stamps on both sides.  I have seen many many with 2 T's on the drivers, I don't know if it was a T to check for the T trim tag and a T for Trim.

Now THAT is an idea... that makes sense.. a T to verify that the trim tag is in place... (the 2nd one on mine is light and below the trim tag and I believe I've seen another one or two cars which have T stamps identical to that)..

Interesting for sure Gary.  I have none of that on mine.  And since there are so many restored examples with stamps on both sides I tend to wonder if people are just following a trend and afraid to step outside of what is considered "normal"

Until I can find more evidence of original cars with a stamp on one side, I'm simply going to restore mine just as I see it, with PTB on the passenger side only.  If at some point it's determined that there definitely should be a stamp on the driver side, then it's easy enough to go back and add it after the fact.  Not a big deal.   I'd like to see more 12D cars though, particularly unrestored, but unfortunately I'm told there aren't many 12D's documented here, unrestored or restored.

[X33RS]

Correction,  This was bugging me so I pulled the car back down, I gave my son some super blue to give the area a little sheen, and a bright LED light and told him to look for stamps around the booster.  His eye's are better than mine.
  I fell over when he said "yeah there is a "T" under the trim tag, and "BTP" off to the right side.

It's so faint you just can't see it without assistance from artificial light and some solvent to give the area a wet look.  Odd that this side didn't hold up very well while the passenger side you can see in the dark, lol.

So this car is in fact much like the 12C car posted above.

[69Z28-RS]

Well hell..  *L*    I suppose I'm going to have to go inspect my passenger side a bit more closely (although I've looked pretty well before... with my old eyes)..

[X33RS]

On the passenger side of mine it's not like others I've seen where the letters are all clumped together.  My letters are spread out evenly straight across the top with about 2" between each letter.  Rather neatly done.   Driver side is sloppy with crooked letters clumped together.  The only straight letter on that side is the T under the trim tag.

[69Z28-RS]

On the passenger side of mine it's not like others I've seen where the letters are all clumped together.  My letters are spread out evenly straight across the top with about 2" between each letter.  Rather neatly done.   Driver side is sloppy with crooked letters clumped together.  The only straight letter on that side is the T under the trim tag.

if I recall JohnZ's explanation correctly, the reason both sides were stamped (typically) is that they had checkers on both sides of the car, checking the Paint, Trim, and Body... not sure if this was 3 guys or one, and that probably varied as well at different times.  Maybe on your passenger side it was ONE man checking all three items, and he was a 'neatnik' (or maybe overly conscientious on his first day?).. 

[X33RS]

Thanks for the explanation Gary.  Makes sense.

[69Z28-RS]

I went to the garage tonight with a high intensity flashlight and examined the passenger side on my firewall...  Nuttin...  no trace of any stamps ever being there even though the paint is in very good shape, whereas on the drivers side they are very legible (once I looked for them)..

[Bryan302]

Well, you two have stirred my curiosity about my stamps on my 05A Z.  Up until now, I thought I had found them all, maybe not!  I found a green P and B behind booster and next to the harness hook , and no T.  I found my T on the right side, centered above the heater core box, nearly to top of firewall.

Would ya'll think my T just wound up on the right side, or I might have two sets?  There are no signs of any other letters without magnification and serious light, which I will do next.   

Does anyone know what shift is for green, day or night?

Bryan

[X33RS]

Bryan, the stamps on the right side of mine above the heater box are also right along the very top edge of the firewall just as you describe your T.    Mine are very neatly placed and evenly spaced compared to most that you see.

It took high intensity light and some liquid to shine things up to find them on the driver side, and I gave that job to my son, he has better eye's than me.  Without any of that there is nothing visible at all, so I always assumed there was nothing there.

I don't know the significance of the color change from orange and green but my first guess is the same as yours, a shift change.

[ko-lek-tor]

  Does anyone know what shift is for green, day or night?

Bryan

I cannot remember where I read, but I believe, to my understanding and memory, that green was 2nd shift, red 1st. Can someone else confirm this, please ?

[69Z28-RS]

Bentley,  I just searched for posts on this topic by JohnZ and didn't find any specific shift information, but in one post responding to that question, John states that 'it was hard to say as people/things changed all the time'... This thread has some good information in it re the PTB stamps and colors, etc...

http://www.camaros.org/forum/index.php?topic=10034.0

[X33RS]

Hmm, seems they can't agree on the placement of the heat riser.  Mine was in the downward position like shown on John's car and the AIM so that's how I'll reinstall it.

If I read everything right there is only a vague mention of the shift change verses color change on the PTB stamps.  Possibly orange being day shift and green being night shift or second shift.  But it sounds as though that's not certain either.

[Bryan302]

Would it be possible to compare components that might have been shift coded and would match up to the color of the PTB stamps for shifts.

My thoughts were the G1 or G2 on the rear axle, or the A or B on the steering sector.  I wold think these components were stamped at the prospective plants, but you get the idea, something that would match.

Bryan

[1968 Z28]

I have a 07C 1968 Z28 that has a mixed bag of colors.  The passenger side has an orange B & P with a green T in line and spaced above the heater box.  The driver side has an Orange B, P, & T  to the right of the wire loom hook and then has an upright green T under the trim tag.  Can't understand how the different colors would line up with shifts in this combination.  Seems that if you had someone inspecting the car for the BPT that they would be doing the inspecting all at one time.  Well I can see the trim tag inspection might be added at a different time than the other inspections.

[69Z28-RS]

JohnZ had posted in a different thread on this topc (several years ago), that the only way different colors would appear on the same car would be a situation where the car did not pass a specific inspection the first pass, and had to be returned for rework or replacement of a part...    made sense to me..