What changes occurred through the production run?

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The CS saw minor changes over the 1968 to 1975 production run. The model year timeline below is not exhaustive, and is subject to edits/corrections:

1969: Change from red rear signals to amber

1970: Front seat gets aluminum backrest trim

1971: 3.0 CS Intro
1971: 3.0 CSI Intro
1971: 3.0 CSI chassis modifications (minor)
1971: 3.0 CSL Intro (carbureted)
1971: 3.0 gauge cluster font
1971: Front seat tilt moves to backrest

1972: Washer fluid nozzle relocation
1972: Chrome tail panel to aluminum
1972: Headrest update

1973: Hazard button relocation
1973: Window motor & wiring change
1973: Window switch change
1973: US 2.5 mph bumpers
1973: US license plate light relocation
1973: FPS 20 spoke wheel intro

1974: Four bar kidney grille
1974: Black windshield wipers
1974: US chassis reinforcements
1974: US 5 mph bumpers
1974: One piece carpet
1974: Front/rear seat upholstery design
1974: Door panel upholstery design
1974: Parcel Tray carpet addition
1974: Trunk carpet change
1974: Adjustable steering column
1974: Manual Trans Bell housing update
1974: Manual Trans Slave update
1974: Manual Trans pivot/fork/clip/throw out
1974: Fuel Tank (drop in)
1974: Fuel Return Line
1975: 2.5 CS Intro
 
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Markos

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Brainstorming:

Kliplan style belts
Roof mounted shoulder harnesses
Three point belts, rear behind back arm rests
black fender/hood grilles
circuit breakers (see window wiring)
window switch asthetics
heater vent style/font/lighting x4
headliner change?
gas tank capacity
brake booster design
ZF to Getrag
vacuum thingies in firewall, 3.0 cs?
55mm to 60mm exhaust
solid to vented front rotors
drum to disk rear
front chin vent width (outermost hole)
dashboard/switch labeling?
power sunroof
carpeted cover rear parcel
 
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teahead

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I"m sure there were more CSL changes.

1972: CSL bore increase to 89.25 mm. Fuel injected?
1973: CSL increased stroke to 84 mm, now displacing 3.2L
1973: CSL can be equipped with BAT spoilers (F&R, wind splitters) as an option (rear in the trunk)
 

Markos

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I"m sure there were more CSL changes.

1972: CSL bore increase to 89.25 mm. Fuel injected?
1973: CSL increased stroke to 84 mm, now displacing 3.2L
1973: CSL can be equipped with BAT spoilers (F&R, wind splitters) as an option (rear in the trunk)
There are plenty of CSL changes and special exceptions. I don’t plan to tackle that one but keep the conversation going. Perhaps one of our resident experts wants a loose timeline. We also have VIN’s and potentially start stop dates for all of this stuff, but may not want to track at that level of detail.
 

Markos

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Hoping more folks chime in with subtleties. I’m tracking to the model year not to MM/yy.
 

JayWltrs

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I can't believe how many 74 problems I seem to have confronted and now can't remember. Is the seatbelt starter-interrupt unique to the 74?
 

aearch

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i disconnected mine first thing i did
also isnt the 74 a black 5 bar not 4
74 no cut out in the trunk carpet
better door panels. , steering wheel
 

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3.0CS US Fasten Seat Belts light on the dash
Differences in the heater controls
Mechanical vs. quartz clocks
If you have years let me know. I have a '72 mechanical clock and a '73 quartz. I have no idea on the heater vents, all iterations. The belt lamp came in '73 correct?
 

m_thompson

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My '72 has a mechanical clock. With enough comments maybe we can determine when the quartz started being installed.
I don't know about heater vent differences, but there are differences in the controls.
My US '72 has the 2.5 MPH bumpers and the seat belt light. I have seen several other '72s that are the same. Maybe they ran out of '72 parts and started using '72?
 

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My '72 has a mechanical clock. With enough comments maybe we can determine when the quartz started being installed.
I don't know about heater vent differences, but there are differences in the controls.
My US '72 has the 2.5 MPH bumpers and the seat belt light. I have seen several other '72s that are the same. Maybe they ran out of '72 parts and started using '72?
Most of this stuff can be referenced in the parts books. I just haven't cracked them open.
 

sfdon

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The ‘74 used a different bell housing and slave cylinder and pivot point.
Also fork, throw out bearing, clip.
 

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How about the number of prongs in on the window switch’s? How about true shape/style of window switches

Do 1974’s have access holes in the door panels?

Did the stalks change on a 1974?

When was the orange-capped diagnostic plug introduced?

Extra engine relay near battery on a ‘74?

Did I mention raised aluminum c-pillar roundels?
 
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