Ed Campbell

My 71 LT-1 has TCS but I thought the base engines did not. Don't know for sure. What is CEC and how does it work?

dennis

have a factory alarm in my 70.(UA6) Became standard in 72. But the lock changed in 70

A few to add.....

Console change for 71
fire wall vacuum metal tubes for 71
wiper door vacuum valve moved after 70.
washer bottle change after 70

vettekid333

The back up lights on the 70 are different than the 71/72. Round circles as apposed to the checkered on the latter models

z10kl

Tail light lenses. Early 71 maybe??

7T1vette

There were several 'cosmetic' changes in that 3-model year period...some have been mentioned; some not. The substantive stuff is that the '70 vette engines had the most potent performance of any vettes made [until recently, of course]. Those same [engine block size] engines were derated via compression ratio and cam changes in '71 and '72. In essence, there is no real difference between '71 and '72 engines other than the published engine power figures. The differences were merely due to rating method differences (SAE net vs. SAE gross). The 'detail' men/women will now tell you the minute differences between those '71 and '72 engines... just ignore them for this discussion, however.

CCrane65

And 72 was the first year you could get A/C on the LT1 cars.

Also in 72 the air cleaner lid did not have a decal...at least on the LS5.

cc

wfo76

1972 last year for vacuum operated wiper door.

1972 last year for solid aluminum body mounts, 73-up is rubber.

1972 last year for nylon cord bias ply tires, 73-up tires are radials.

1972 was the first year for a smog pump on the LS5.

1972 was the first year that any Corvette engine could not be sold in Calif (LS5).

1972 was the first year since 1956 that you could not get a 4.56 axle on a Corvette.
From 70-72, the 4.56 was available on the ZR1 only, but was dropped for 72.
The lowest axle ratio after 71 now became the 4.11.

1972 was the last year that you could get a 3.70 axle on a big block,
after 72 the 3.55 would be the lowest available with a big block.

72 was also the last year of the restriction against the big block/M21/AC combination,
for 73 you could now get the LS4/M21/AC, for 69-72 M21 required a no AC car.

a560156

70 has THREE studs and one screw.

Ed Campbell

70's and early 71's tail light lenses had a cone shape with a point in the center and late 71 on had dome shape lenses with no point.

early shark

1971 is the only year to have horsepower figures from the 200 range, 300 range and 400 range.

1970 all engines in the 300 range.

1972 all engines in the 200 range.

70Yellowbird

with you ... thanks for correcting my error. Just another 'Senior Moment' for me.

Clue

And that's because of the difference of gross and net HP measurement's, rigth?

early shark

Clue,

Not exactly.

Z-man

Also, the '70 models were, by far, the best looking of the three years...

56early

Reverse light lens's , gauge lettering, shoulder harness access holes in seat backs , opitic fibres, radio *****, removable rear window., parking lenses. These are the easy eye ones.

56early

Forgot to mention . right side dash is different for 72 , than 70 and 71. it doesnt have the lower protrusion on the console side.

c3_dk

2 year's

R1234

In 1972, GM put the engine code in the vin number.
K = base motor
W = big block motor
L = LT-1 solid lifter motor

70Yellowbird

I just looked at ondagawood's '72 project yesterday, and noticed that it has front seat belt retractors under the carpeting, whereas my '70 doesn't have them, but does have chrome holding clips attached to each seat to hold the lap belts neatly in place.

How about the '71 configuration?

71 Green 454

Did it look something like this?