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#1
01-29-2021, 05:03 PM
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All 68 and 69 U.S. model Z/28s had smog pumps (A.I.R.).
In 67, smog pumps were only required on the California sold vehicles. 68 all the Z motors were MO coded. 69 all were DZ. In 67, the engines without smog pumps were coded MO. With smog pump it would be coded MP. http://www.camaros.org/drivetrain.shtml#PadStamps
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Don't believe everything you read on the internet ... Ben Franklin Last edited by Lynn; 01-30-2021 at 03:13 PM. 
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dykstra (01-30-2021) | ||
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#2
01-29-2021, 05:20 PM
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Quote "All 68 and 69 Z/28s had smog pumps (A.I.R.).. (quote)..
Not in 1968 if one was delivered to Canada for sale. My '68 Norwood 'MO' car was KD1 smog exempt on the documentation from GM Canada.. Last edited by realzed; 01-30-2021 at 12:44 PM.
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Tracker1 (05-20-2021) | ||
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#3
01-31-2021, 03:17 PM
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Quote:
So the engine was still coded MO? Did they just remove the smog tubes and plug the holes? Or did they come with different exhaust manifolds? Just curious.
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Don't believe everything you read on the internet ... Ben Franklin
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#4
01-31-2021, 06:24 PM
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When I got my Z2/8 it already had headers - but from the CRG site it states that the manifold holes had threaded in plugs.. and regular pcv setup on the ds valve cover.
And YES the engine in mine had the MO suffix.. 678 block, it was considered an early 1968 model build Z2/8 with December '67 year block casting and assembly date, with an original 266 'left over GM parts bin' distributor, which there were a few of.. as per JM's Definitive book..
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