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#1
09-26-2006, 10:09 PM
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68 Smog System
Anybody know the correct pump casting number for a 68 L78, L79 Nova smog pump? Is the date a julian date code? I know it has the pressure relief on top but I'm not sure of the casting #
Thanks, Mike 
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#2
09-27-2006, 12:27 AM
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Re: 68 Smog System
The pump casting numbers are the same as other 68-71 pumps. I don't have the casting number for the rear cast piece here at work. the julian date is in the format dddy1Y. I don't have my notes here at work but I believe the julian date on the pumps without the relief valve ends in a Z.
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Martin Foltz 68 Camaro SS-396 L35/M20, Corvette Bronze, black vinyl top George Olsen Chevrolet San Francisco
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#3
11-01-2006, 06:57 AM
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Re: 68 Smog System
As Martin said, most of the pump housings are the same. Caddilac (and may be some others) housings are machined to come out the side not the rear.
This should answer most of your questions: http://www.camaros.org/emissions.shtml
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Kurt S - CRG
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