I have a quadrojet, which I was told was the original, but if I'm reading the code stamping correctly, it's not.
I saw two codes (one on a circular pressed piece on the side) that had 7037202 and HO or HD with I believe M6 - and then one pressed into the metal on the back side that was 7032750
I googled 7037202 and from the results it looks like it was a '67 era carb for a 327 or 350 (I have a 400). Thing is, on the base is a stamping that I think is the date code, which reads 0318 (or 31st day of 68).
7037202 carb is a 1967 Chevy 4 barrel for a 327 or 350 auto trans as you stated. The circular tag is the carb code and date M6 which is December of 66. The baseplate has another date code of January of 68. When you say "pressed in" are you talking about the small 3/8" casting which is circular with 7 digits within the circle? Those can be found on the base, airhorn. Here is a pic
There were the first year Firebird carbs that had a round metal tag on the main body that had the carb number and date on it as well. After 67, they stamped the carb with the carb number and two letter plant code.
Here is a pic...
Don't confuse the cast part numbers for carburetor ID.
Here is the later 68 up carb number and plant code.
If you are racing a car, a Holley is the better choice. If you have a daily driver, go with the Q jet. You will be fine with any Q jet that is calibrated properly. These carbs are "on demand".
I had an 800 cfm Buick Q Jet on a 428 and used it on a 350 with no issues.
It's all about tuning jets and rods.
Si Vis Pacem Parabellum
1967 Starlight black PMD Engineering 400 Auto 1968 Alpine Blue 400 4 speed 1968 Verdoro Green 400 HO 4 speed 2013 1LE 2SS/RS Inferno Orange Camaro.