Firewall Number

[lakeholme]

I know this is a shot in the dark, but anyone have any idea what the number "254" means crayoned on the firewall (near heater box). I know about firewall markings in general.  I just can't figure out 254...
Thanks in advance.

[JohnZ]

Is it on raw metal underneath the blackout paint, or was it applied on top of the blackout paint?

[lakeholme]

On top of the blackout paint...

[JohnZ]

Could be an assembly sequence number, although Styling frowned on having things like that visible on finished cars (unlike all the firewall graffiti-laden restorations you see these days).

[sd1968z28]

isn't that the truth, i have had many original cars, including the 68z i now own, i have never saw the pbt bull under the hood of any.  so isked my dad who was a chevrolet dealer until 4 years ago.  he told me maybe the were there sometimes, but usually they came off the first time you washed the car. my car looks to have a cpx under the black firewall paint.  hard to tell.

[Jonesy]

My car had 252 under the heater box on top of the paint.

[lakeholme]

Thanks, John!  Am I correct that an assembly sequence number would be the "locked in" number that you mention in your report on the assembly process?

Sorry to be a little slow in getting back to this... Have to work every now and then to keep my toys up!

Last week I (finally) got original pictures from a previous owner before he painted the firewall in a restoration.  The 254 was the only such marking visible on the whole wall --just like you said.  Like Jonesy's 252, it was mostly covered by the heater box.  There was no sign of PTB markings.

[JohnZ]

Probably a Fisher Trim Shop sequence number, since it was covered by the heater blower case, which was one of the first parts installed on the Chevy side of the plant.