P-T-B

**allcamaro** · #1 12-21-2003, 10:50 PM

When puttting the PTB on the firewall was the ( B ) put on before the painting of the car or after? I would assume the P was after, and the T was also after the paint was on. If this is true would and could the ( B ) have some overspray from the body color.

**Salvatore** · #2 12-22-2003, 01:10 AM

That is a very good question. I would ask Jerry MacNeish and Brian Henderson and compare notes. [img]/ubbthreads/images/graemlins/dunno.gif[/img] Sam

**bkhpah** · #3 12-22-2003, 11:17 PM

I have many photos of original untouched firwalls and I have never noticed any overspray on the 'B'. I even put some on the computer and did a CSI style blowup. Cannot see any evidence of body color. Good question though...BKH

sYc · #4 12-22-2003, 11:46 PM

Brain, I have been told by a reliable sourse that the PBT was the last thing Fisher Body did before the body (firewall back) was released to the Chevrolet side of the plant. There were two inspectors at the end of the line who check the P-paint, B-body(sheetmetal) and T-trim. So, the markings would be on top of any paint.

On a side note, the firewall crayon markings will be under the firewall paint.

**bkhpah** · #5 12-23-2003, 02:06 AM

That is what I have always seen. Thanks..BKH

Jeff H · #6 12-23-2003, 04:41 PM

My LA built JL8 car had the broadcast sheet sequence # written on the firewall on the driver's side. It was hidden by the fender so it was in good original condition when I took the car apart. I could't tell if it was chalk or crayon, but it was written on top of the black firewall paint. There was also some writing on the center of the firewall that was either "72" or "Z28" and since my car is Hugger Orange, I thought it was "72". It appears the LA plant did things differently than Norwood.

68ys8030 · #7 12-24-2003, 12:59 PM

in the jerry macneish Z/28 fact book there is a really good picture of an original firewall with the PTB stamps on it. if you look close you can see the overspray on the "b" as if
it was stamped on before the body was painted the color.
the picture is on the top of page 184. hope this helps!

**njsteve** · #8 12-24-2003, 06:17 PM

My 02D built Z11 had the orange "P" and "B" behind the A/C evaporator housing with no overspray. The "T" was below the firewall data plate, again with no eveidence of overspray. The remains of the crayon marking "C60" and a "23" were visible under the blackout firewall paint. I can scan the photos in and try to link them here if you need them. Happy Holidays, NJSteve

Unreal · #9 12-24-2003, 07:11 PM

I had PTB under my evaporator box, as well. I didn't have the foresight to photograph it, but I'm not going to remove it now. [img]/ubbthreads/images/graemlins/smile.gif[/img]

NCGuy68 · #10 12-24-2003, 10:23 PM

[ QUOTE ]
My LA built JL8 car had the broadcast sheet sequence # written on the firewall on the driver's side. It was hidden by the fender so it was in good original condition when I took the car apart. I could't tell if it was chalk or crayon, but it was written on top of the black firewall paint. There was also some writing on the center of the firewall that was either "72" or "Z28" and since my car is Hugger Orange, I thought it was "72". It appears the LA plant did things differently than Norwood.

[/ QUOTE ]

I agree......my Van Nuys 68 Z28 has what appears to be "Z28" in crayon under the heater core cover. No signs of P-T-B on the firewall as Norwood did.

Can anyone else shed light on this subject?

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