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Discussion Starter · #1 ·
Hello, I have an original 67 L78 Camaro that I'm trying to restore (put back on) the smog system. I am having much difficulty determining the CORRECT setup for this car as there aren't many original setups left. My main concern is simply the smog pump bracket and pump-the rest of the system kind of falls into place. Oh, the correct smog pulley would be good to know also. I've been told it’s an "0800" but the rest of my pulleys are deep groove and that's not. ANY HELP WOULD BE GREATLY APPRECIATED.

Thanks,

Leif Bertrand
305 674-3391
 

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Leif,

According to my Parts Manual, the 67 Camaro was a "one off" year for the big block smog Bracket and Brace. The Bracket (the lower part) is P/N 3882831 and the Brace (the upper part) is P/N 3921935.

The Smog Pump Pulley is supposed to be P/N 3880800, but the Camaro Research Groups 1967 Camaro Pulley ID Chart also states that original cars have been found with the 3881885 Pulley. My Parts Manual shows the 3880800 as being correct for the 67 302 and 396. It shows the 3881885 for 67-67 all 8 cylinder, EXCEPT 302 and 396.

Now, are you totally confused!!!???

Heck, make your life a little easier. Just tell people that your car ISN'T a California car!!

:D

By the way, GREAT last name!!
 

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Discussion Starter · #7 ·
Thanks for the replies.

Ok, if I use the 3882831 bracket it puts the smog pump in line with the 3rd groove...then what about the power steering?? Does the 3873847 (power steering) pulley line up with-the second groove?? My car didn't come with PS but I'm in the process of adding it as well. That would mean that the 2nd groove on the water pump wouldn't be used... Good thing is I have the 3882831, and the bottom "dump" smog pump if that is indeed the correct setup. Again, thanks for all the help.

-Leif Bertrand
305 674-3391
 

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Discussion Starter · #9 ·
Here's what I've found with my research:

The smog pulley looks to be a 3880800

There are two different smog pump brackets under consideration:

3882831 (L35 for sure) with 3880800 lines up with 3rd track (conflict with Power steering)
3877644 L78 (Unverified) with 3880800 lines up to 2nd track

The 3882831 bracket seems to mate with a "bottom dump" pump- A pump that exits out the bottom instead of the rear.
The 3877644 bracket seems to mate with a more standard rear exhaust pump like the Z28 and others same year.


The Power Steering pulley looks to be a 3873847 (3rd Track)-Via all available written material found.

The big question for me is Which bracket for the L78 setup. Does an L78 with Power Steering use a different PS pulley other than the 3873847? Also, I found that the 3877644 bracket raises the pump UP in addition to moving it back a track (2nd track). The hood insulation on my car was "grooved" slightly from the turning pulley. I can't imagine GM would position the pump so high-maybe 1-1.5in from the hood's metal under surface?
Using the bracket 3882831 puts the smog pulley smack on the thrid grove so any car with N40 (power steering) would have to have a different pulley to line up with the 2nd grovoe? Or could it be that the smog belt ran off the water pump's (3rd groove) pulley only and the Power steering off the crank's 3rd groove?. If this is so then the 2nd groove would go unused for an L78 with K19 and N40- Seems strange. Can anyone add to this??
 

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Discussion Starter · #10 ·
Ok, so I guess on the L35's the smog pump just runs off the 3rd groove on the water pump. If power steering was added, the PS pump would be driven off of the 3rd groove on the crank only. That solves my conflicting PS pump/AIR pump issue. But, what about the L78? Either way, the second groove isn't used? I've seen more than one L35 with a double groove alternator pulley but don't know if that's original. I've never seen an L78 with a double deep groove alternator pulley...
 

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doe's anybody have any idea of how many 67 L-78 rs ss convertibles were made and what it would be worth. 1 have a original car partialy restored real nice driver marina blue with bright blue interior power nothing. may be going on the market real soon any intrest contact me mike it won't be cheap
 
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