1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year > 1968 Mustang
Id/info on "smog motor"
svo2scj:
Hi Guys
(not a big EARLY car guy)...........I sold a 289 to guy this week as a core to rebuild and pulled THIS (attachement below) out to get at the other motor!
Can you shed light on WHAT it is?? My guess is it is an early 1968 J code motor from a DSO with smog. Heads are 7L2 and 7K31. Engine tag shows 289 C 67 -14 and a code of 250A which is a 4V.
What started out as "I can provide you a cheap core" turned into this motor is the wrong date code/that motor is incomplete etc etc. I don't care-but IF someone needed this it would be better to go to a resoration IMO.
With thanks
Mark
krelboyne:
A J code 1968 engine was a 302-4V. Cylinder heads have a "4V" cast under the valve covers. True thermactor smog cylinder heads for the 302-2V or 302-4V, have individual drilled and tapped holes for the smog tubes.
289 smog heads do not have 4 drilled and tapped holes for smog tubes. Used same smog design as 1966-67 California.
67gtasanjose:
You will need to get more numbers or better pictured to ID this. Not 289 heads as Scott said, looks like later smog style at the backs of the heads.
jwc66k:
--- Quote from: krelboyne on March 21, 2017, 06:09:18 PM ---A J code 1968 engine was a 302-4V. Cylinder heads have a "4V" cast under the valve covers. True thermactor smog cylinder heads for the 302-2V or 302-4V, have individual drilled and tapped holes for the smog tubes.
--- End quote ---
I believe that those heads had the single injector hole at the right hand front and left hand rear for the air inputs.
--- Quote from: krelboyne on March 21, 2017, 06:09:18 PM ---289 smog heads do not have 4 drilled and tapped holes for smog tubes. Used same smog design as 1966-67 California.
--- End quote ---
Ford used the four hole per head thru out 1966 in California for all 289 engines (except the HP which was exempt) and into 1967. Sometime in mid 1967 production (Jan-Feb 67?), the 289 heads changed to the single input port. As soon as the exemption for smog tests for cars built before 1974 was put into effect, the four hole types were pugged, or swapped for non-smog types.
Jim
krelboyne:
--- Quote from: jwc66k on March 21, 2017, 07:13:03 PM ---I believe that those heads had the single injector hole at the right hand front and left hand rear for the air inputs.Ford used the four hole per head thru out 1966 in California for all 289 engines (except the HP which was exempt) and into 1967. Sometime in mid 1967 production (Jan-Feb 67?), the 289 heads changed to the single input port. As soon as the exemption for smog tests for cars built before 1974 was put into effect, the four hole types were pugged, or swapped for non-smog types.
Jim
--- End quote ---
Thanks Jim, I did not know about the change in 1967.
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