I'm glad Cliff chimed in here...
I read the 'preview' of this thread where you suggested that this was a '78 Pontiac 350 carburetor, and felt the need to chime in on two inherent flaws with that statement;
1) The Pontiac 350 was built, and installed in 1968-1977 Pontiacs;
>to the best of my knowledge no 1978 Pontiac 350's were built.
>>I believe the only Pontiac engines produced in 1978 were the new short deck engines, and the 400 (in it's final year of production btw)
>>I believe the only 350 powered Pontiac's were "corporate" as in they either had Chevy, or Buick engines.
2) To the best of my recollection the numbers allotted for Pontiac's carbs were;
'26- & '27-
additionally, (I am not familiar with OHC carbs) I am not aware of any Pontiac carbs ending in "1" ~ I have seen buick & chevy carbs that way though...
262, 263, 264, 265, 266, 267, 268, 270, 273, 274 are the more common Pontiac Carb suffix's
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For anyone's future use;
To decode a Rochester;
OEM carb numbers break down into three parts - before and after the model year;
17058241
1a) "1705" (vs 702 / 704 / 1708)
> 1b) "70" is one float bowl depth, "170" is a different float bowl depth
>>1c) "702" are for 1969 & earlier; "704" are for 1970-1974/5; 1705 are 1976(?) through 1980; 1708 are 1980 through 1987
2a) "8" model year final digit;
>2b) if this was a 7028 this would be a 1968
3) "241" this is the application number; to the best of my knowledge most Rochesters ending in an uneven number were intended for manual transmission applications.
I hope my post is of use to someone... at some point
