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Old 01-14-2020, 05:41 PM
clayran clayran is offline
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Default Question about '74 350 smog system

Wondering if someone familiar with Chevy small blocks could tell me if the smog system off a 1974 Monte Carlo 350 2 barrel carb engine would look correct on a ’69 and up 302 or 350 engine. Would the pump, air tubes(my word) that connect to the exhaust manifolds, etc. look correct? Would the pump be the same as used on the h.p. engines? The date codes would be off & the pump fan is black but wondering if the components and mounting location match the older engines. Thanks for any info & help.
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Old 01-14-2020, 06:22 PM
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27,000 MILE 1974 Z28 (Hopefully the Monte's looks like this?)
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Old 01-14-2020, 06:24 PM
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1969 Z28 302

At a local car show or event with the hood popped open, you'd probably be A-OK, except for the most "eagle-eyed" patrons.
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Old 01-14-2020, 06:25 PM
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7801149 pump is the same except for black fan, if the diverter valve looks like the 29295 in posted picture it will work. Smog rails would work but be incorrect for a 69, brkts will work too. pully would be a shallow groove "116" not the correct "458" deep groove, check valves are the same 5361992. Repo rails are cheap, $90
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Old 01-14-2020, 06:48 PM
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The grungy engine compartment is a survivor 1969 Z28

And the other pics are another survivor 1974 Z28
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Old 01-14-2020, 07:13 PM
rszmjt rszmjt is offline
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That survivor 69 Z is probably a early car with the wire reinforced diverter valve, GM went to the re designed 29295 diverter about Nov/Dec/68
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Old 01-14-2020, 07:59 PM
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Quote:
Originally Posted by rszmjt View Post
That survivor 69 Z is probably a early car with the wire reinforced diverter valve, GM went to the re designed 29295 diverter about Nov/Dec/68
02B X33 car actually

https://www.hotrod.com/articles/rare...asley214-jpg-2
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Old 01-14-2020, 09:06 PM
rszmjt rszmjt is offline
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Thanks for the link, neat car. I restored a 02B Van Nuys Z a few years ago and it had the other diverter valve. I was told by 1 of the smog gurus about the wire reinforced hat on the diverter valve, but I guess maybe it was later it was used.
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Old 01-14-2020, 10:15 PM
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Quote:
Originally Posted by Tracker1 View Post
1969 Z28 302

At a local car show or event with the hood popped open, you'd probably be A-OK, except for the most "eagle-eyed" patrons.
Are there more pics of this ‘74 posted somewhere? (Being a 74z owner myself)
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Old 01-15-2020, 01:42 PM
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Quote:
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Are there more pics of this ‘74 posted somewhere? (Being a 74z owner myself)
Could be yours I dunno You will need photobucket

https://s1190.photobucket.com/user/74Z28/library?page=1

http://www.thecamarotrader.com/details.php?id=23888

THIS IS ANOTHER:

https://www.mecum.com/lots/SC0510-91...t-camaro-z-28/
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