1966 L-72 SS questions - Impala Tech
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post #1 of 14 (permalink) Old 11-29-2006, 09:28 PM Thread Starter
 
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1966 L-72 SS questions

Was A/C an option with the L-72 motor in `66. Best I can tell this engine option was only available with a 4 speed manual. Is that correct?
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post #2 of 14 (permalink) Old 11-30-2006, 04:49 PM
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GM never offered A/C on any high performance big block engine (rectangular port heads) or high revving small block engine (275 horse 327, 290 horse 302, or 350-370 horse 350's) because of their bad habit of throwing V-belts. (Only exception that I can remember was the LS-6 454 Chevelle could have been optioned with factory A/C, but few were).

GM learned their lesson early with the high winding 283-327 and the 348-409 family of engines with A/C as an option never making it out of warranty without overheating claims, and compressor repairs. Of course all bets are off on COPO cars, which is what COPO was for, but then, there were significant warranty restrictions on those cars.


Big Dave
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post #3 of 14 (permalink) Old 11-30-2006, 08:30 PM Thread Starter
 
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Thanks Big Dave, I was wanting to discard the factroy stuff and go with the cleaner look of a vintage air type system anyway. Any other L-72 tidbits you care to share before I make any errors?
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post #4 of 14 (permalink) Old 12-03-2006, 12:30 AM
 
 
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A/c

Generally,

Chevrolet motor division did not offer A/C with any solid lifter engine due to warranty issues. The L36 390 HP 427 could be ordered with A/C as with the L35 396 325 HP. And to keep the record straight you CAN get A/C with a 275 HP 327 due to I am currently selling my all original 1967 Impala wagon with these options.
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post #5 of 14 (permalink) Old 12-05-2006, 07:56 PM
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Hi Raj, How are you?
There are a couple exceptions to that rule. One of them is the '64 Corvette with the L-76 365hp with A/C. It's a solid lifter motor that was actually offered with A/C! I think the 340hp may have been another. I think there were something like 138 of them built in '64. I've worked on one for a friend. Neat car!

Verne
PS: Haven't heard form you or Mark for awhile.
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post #6 of 14 (permalink) Old 12-08-2006, 07:23 PM
 
 
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hey racer17 what kind of car are you working on? is it going to be stock appearing other than a/c. just curious, dennis
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post #7 of 14 (permalink) Old 12-09-2006, 09:28 AM Thread Starter
 
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The project started as a`66 big block/glide SS. When it became apparent that the car would need a frame off I “ordered” a few more options. Locating all the parts to build a date correct L-72 for a 10/65 car was a challenge but all the other additions came right out of catalogs. I upgraded the brakes, suspension, wheels/tires and swapped the 2 speed for a 700R4. Otherwise it will basically be stock appearing. jeff
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post #8 of 14 (permalink) Old 12-10-2006, 07:27 AM
 
 
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Thumbs up

i see, you are upgrading the 66 to a better handling/preforming car. i am still lost in the 60"s, i like the original look, not to say that modifying is bad. i think it's a matter of taste. and with todays prices it's almost impossible for a "regular joe" to build a original dated car. well good luck with your project. dennis
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post #9 of 14 (permalink) Old 12-10-2006, 10:40 PM
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I could sure use that powerglide tranny for my 61
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post #10 of 14 (permalink) Old 12-11-2006, 08:16 AM Thread Starter
 
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Dennis; I like the original look of the cars as well with the exception of the nose high attitude they had from the factory. The brake and suspension mods are bolt on but I’m restoring the original parts and boxing them up. The 396 that was in it, although nice, is 6 months newer than the car so we built the date correct 427. You’re right about the expense involved. I could of bought two ZZ 502 crate engines for what that thing cost! jeff
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post #11 of 14 (permalink) Old 12-11-2006, 10:01 AM
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Quote:
Originally Posted by dgwar View Post
I could sure use that powerglide tranny for my 61
Speaking of powerglides, what years had the rear pump that allowed for push starting of the car and which years didn't have it? Also isn't there a year were they swap the case from steel to aluminum?
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post #12 of 14 (permalink) Old 12-11-2006, 03:02 PM Thread Starter
 
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If interested in the PG let me know. I should have it back and can get whatever numbers off of it that you might need in the next week or so. jeff
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post #13 of 14 (permalink) Old 12-18-2006, 10:29 AM
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Quote:
Originally Posted by Gloryhound View Post
Speaking of powerglides, what years had the rear pump that allowed for push starting of the car and which years didn't have it? Also isn't there a year were they swap the case from steel to aluminum?
First year for the aluminum Glide was '62 with the 327. 283s still used the iron case. '63 they were all aluminum and redesigned. '62 aluminum is unique.

Verne
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post #14 of 14 (permalink) Old 12-18-2006, 07:51 PM
 
 
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thats interesting, what was different between the 62 327 aluminuum powerglide and the 63 327 powerglide? dennis
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