[carbking]

As I posted before, there should be a large thread on this in the archives. However, I will post what "matching numbers" means to me:

(A) All components which have casting numbers will be the correct casting number for the vehicle as specified by original documentation.
(B) All dated components will be dated prior to the "build date" of the vehicle.
(C) All components with recorded serial numbers (ie engines) will be the original part as came with the car.
(D) All options will be as defined by original documentation (Pontiacs) if available OR will be recognized as dealer installed (ie radios, hubcaps, etc.).
(E) Paint and trim will be as defined on paint and trim plate affixed to vehicle.
(F) Aftermarket parts will be limited to those items not visible (ie pistons, gaskets, etc.)

When did Pontiac start stamping the serial number on engine blocks? I don't know, but I do know that the serial number was stamped on my 1964 GTO engine block (drivers side front).

Dated components for "normal production" vehicles should have the date in a reasonable window prior to the build date. This window normally would be from 2 to 10 weeks. This window does not apply on vary low production vehicles. Example, we have seen many Rochester 7029273 (RAIV S/T) carbs, but only 5 date codes. Obviously, this carburetor would not fit into the 2/10 window.

OK, there's a target. Everyone take your best shot!!!

Jon.

Good carburetion is fuelish hot air.