The 4-speed carb is a direct bolt on and will work just fine. The only difference is, you will have to transfer the kick-down switch contact shoe to the new carb. Its worth a try.
That kickdown switch is correct for a 69 B-body 4 barrel. 69 2 barrel switch is different, and was used in the early 70 4 barrels. A mid-year change on the 70 B-body's went to a throttle cable, and the kickdown switch moved to under the dash.
Re the carb, my 70 454 345 hp LS4 is 7040200 EE, so I'm guessing your 69 427 335 hp LS1 should be 7029200 EE (given the 4 speed one is 7029201 ED). 3318 is the Julian date, just can't remember how it decodes, but I think it's the 331st day of the 1968 calendar year.
That kickdown switch is correct for a 69 B-body 4 barrel. 69 2 barrel switch is different, and was used in the early 70 4 barrels. A mid-year change on the 70 B-body's went to a throttle cable, and the kickdown switch moved to under the dash.
Re the carb, my 70 454 345 hp LS4 is 7040200 EE, so I'm guessing your 69 427 335 hp LS1 should be 7029200 EE (given the 4 speed one is 7029201 ED). 3318 is the Julian date, just can't remember how it decodes, but I think it's the 331st day of the 1968 calendar year.
Yes, 7029200 EE is correct for 335hp 427 automatics. Date for the 3318 code, is correct too 331st day of the 1968 calendar year.
regarding the carb stamping, Rochester revised how it stamped numbers for the 1969 model year from what it dod for 1968, then revised it again during the model year.
But I need to push pause, because something seems fishy about that m/t carb.
Rochester used a four digit dating system; XXXY XXX = the numeric day of the year Y = the final digit of the calendar year
Now, this is the clincher; The two letter 'pick code' was only used for carburetors manufactured during a window of time where they might be sent to the vehicle production floor; After the carburetor was no longer used during production, the pick code disappeared.
ok; Back to the two carbs:
a) 1966 through to VERY early 1968 Quadrajets used a stamped disc that was attached to the fuel bowl; b) most 1968 Quadrajets only had the application code and pick code stamped on the fuel bowl - the date code was stamped on the throttle body; this stamping on the fuel bowl only used a single line stamp. c) early (and most) 1969 model year Quadrajets had the application code stamped like the 1968 units, in that it used a single line stamp; unlike the 1968 stamping, the first two digits for the application code were dropped and the pick code immediately followed the application code. There was a single space, and a four digit date code stamped after the pick code. d) late in the 1969 model year, the stamping was revised to now take two lines; the full application code came back, with a double space between the application code and the pick code; the second line now had the date code.
Your (70)29200 carb looks 100% legit, the stamping is uniform, and nothing seems out of place; That carb was manufactured on Thursday November 26th 1968. (The 1969 model year would have been September 1968 through to July 1969)
Your 7029201 carb looks to be restamped; The "7" is double stamped - I believe that the way these were stamped, this wasn't possible. The stamping is not uniform - notice how it gets more defined at the end(?) The assembly date is wholly wrong for a carb with a pick code; That date (0751) is for March 16, 1971. A 1969 model year carburetor manufactured in 1971 should absolutely NOT have a pick code.
I hope this helps.
It's relly too bad that there are some in our hobby that do stuff like restamping to make a buck...
-- Edited by unruhjonny on Tuesday 5th of September 2023 06:22:49 PM
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1970 Formula 400 Carousel Red on black (std) interior "no drivetrain option" car (same base drivetrain as GTO) 1:411 1970 Firebird Formulas originally sold in Canada
Your 7029201 carb looks to be restamped; The "7" is double stamped - I believe that the way these were stamped, this wasn't possible. The stamping is not uniform - notice how it gets more defined at the end(?)
-- Edited by unruhjonny on Tuesday 5th of September 2023 06:22:49 PM
The "7029201" actually looks like it's cast, not stamped doesn't it?
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars
