[Baron Von Zeppelin]

64 GTO PHS Baltimore Plant
This appears to have been a 78X 3spd 4bbl
Is "RB" the correct trans code for 3spd ?

Seem to remember Baltimore coding is all wacky ,,, I think.
This car is only physically presenting
Power Steering and Power Brakes
Console , Back-Up Lights , Manual driver side mirror
and some 65 style standard seatbelts

Is there anything missing or added compared to PHS ?

[Baron Von Zeppelin]

It has a complete 78XW engine about 100,000 units too early
And a 4spd

Nice solid looking convertible
Skyline Blue , Blue Interior , White Top

https://bringatrailer.com/listing/1964-pontiac-gto-78/

[b-man]

Shame there’s a Chevy air cleaner lid on it instead of the lovely original chrome unit with the short snorkel.

[Baron Von Zeppelin]

b-man refresh my memory if you can .
Where is the casting date on 64 - 4bbl intake - - rear - or bottom
And casting dates on 64 - 9770716 heads - - underneath covers - or below the exterior rail
In case the seller wants to get down to brass tacks

Those air cleaners have always been few and far between.
Once in a while I would luck up on a 326 HO car with a painted 4bbl version of it.
The top piece was the same on all the 326 2bbl - but painted

[b-man]

Intake date codes are on the bottom of the intake and head date codes are under the valve covers.

[Baron Von Zeppelin]

Thanks Bart
I doubt the seller will want to get that deep.
But he could still check the block date on a clean engine pretty easy.

[johnta1]

It has a complete 78XW engine about 100,000 units too early

What's the EUN are you using?

I have it at about perfect for it.



I also can't find my notes on the tranny code, but should be in the GTO 'Bible'? (that is buried at the moment)

[Baron Von Zeppelin]

The EUN for the original 78X on the PHS / PoP imprint should be perfect.
326254. ( 06B body date)

The EUN for the current 78XW that is installed is about 100,000 units earlier than that.
225103

[Baron Von Zeppelin]

Just found an old 2009 post from John V that "RB" is for 4spd Wide Ratio

Still hunting info
Maybe the X on that particular PoP from Baltimore was generic
And it should be a 4spd 78XW engine code.

[johnta1]

The EUN for the original 78X on the PHS / PoP imprint should be perfect.
326254. ( 06B body date)

Hmm...
I copied the info when that it 1st came out and my pic seemed to show a '5' start, your pic in post seems pretty clear.


To me the eun I had fit good, 526254 for a 6B body.

[Baron Von Zeppelin]

John
The whole point is the engine now in the car has EUN 225103
That isn't anywhere close whether the PoP number starts with a 3 or a 5

The engine in the car starts with a 2
It doesn't resemble the number on the PoP in any form.
As in it is not the born with engine.

Car was claimed to be numbers matching

[Baron Von Zeppelin]

Evidently John V. is the only one left standing who can cross the Chevy code numbers on these.
I googled everything I can think of and can only find RPO codes such as C60 D55 M40 for Chevy

Code 303 and Code RB both equal 4spd
So it was not a 3spd car
78 XW would be proper block code with a 3K / 3.23 posi

Have requested seller to verify the block casting date and gave instructions.

[johnta1]

Car was claimed to be numbers matching

I see what your getting at. ( I just wrote the numbers from POP)




Agree 100%.

[Baron Von Zeppelin]

Using a couple of John V.'s previous deciphered Baltimore 64's
So far have this :

303 = 4spd
31D = 389 4bbl – GTO use only
321 = Posi
342 = ( this box is usually where power brakes and power steering codes are)
the #2 should represent power brakes
350+366 are combo codes = White line Tires
44C = (this box is usually where radio equipment goes)
the C should represent the AM pushbutton radio with manual antenna
62A = Console

Still 5 more Codes to account for
431
452
461
482
531

I see Back Up Lamps , Dual Speed Wipers , Driver Rearview Mirror
That will be 3 of the 5
I also see Pwr Steering , but that should probably make box 34 into a 3 instead of a 2 (combo of #1 and #2 = 3) maybe.

[johnta1]

From John V's article in Smokes:

box 30 is for 4 speed wide ratio

box 44 - C: Pushbutton AM radio– manual antenna (Pontiac Sales Code 392)
box 45 - 2: Windshield washer w/dual-speed wipers (Pontiac Sales Code 421)
box 46 - 1: Tinted glass– windshield only (Pontiac Sales Code 532)
box 48 - 2: Custom wheel discs (Spinners, Pontiac Sales Code 521)
box 53 - 1: Ivory convertible top
box 62 - A: Floor console (Pontiac Sales Code 601)

[Baron Von Zeppelin]

Thanks John -- Great !
Anything on #431 - possibly back up lamps or driver side rear view mirror

[johnta1]

HD Air cleaner possibly for 431
That's actually the sales code for 431.

Box 43 - 1: Back-up lamps (Pontiac Sales Code 471)

[Baron Von Zeppelin]

Process of elimination
431 has to be Back Up Lamps

I went ahead and posted it .
Thanks John

Car is really really honest overall
The steel blue-gray accents on ribbed dash trim, heater control, console, all looks original unrestored.
Pretty tight on a convertible 60 years old .

[Baron Von Zeppelin]

I got that wrong about the ribbed dash trim , color has been removed.

That's a real pretty color combo , I think it will sell.
Lot of RNM endings on BaT lately.