Bought a 66 GTO cloan - Pontiac GTO Forum
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post #1 of 19 (permalink) Old 05-23-2009, 06:21 PM Thread Starter
 
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Bought a 66 GTO cloan

Hey,
I just got back from trading for a 66 GTO cloan. Southern car, good frame and pan, decent paint, good 10' car. It has a 66 389 YE 325HP motor in it, bucket seats, 2 speed trans w/floor shifter and console. How do I tell if it came with the 389? Also, most Lemans came wtih the 326, how rare is this car? It's not a 242 vin car, 273. It also has the Pontiac vacuum gauge on the console, neat stuff. Needs some TLC, but is an alright driver grade car.


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post #2 of 19 (permalink) Old 05-23-2009, 08:32 PM
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No Le Mans's came with a 389. Only the 6 cyl or the 326 V8. Enjoy the car!
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post #3 of 19 (permalink) Old 05-23-2009, 09:39 PM Thread Starter
 
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Appreciate the comment, hmm, now I'm confused.
What about the vacuum gauge on the console, many cars have them?
You couldn't dealer option a 389 in a Lemans, like the 2+2 cars?
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post #4 of 19 (permalink) Old 05-24-2009, 11:05 AM
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The console vacuum guage is a correct option for your car, and not seen a lot. Good one! No dealer installed 389's unless it was a customer who blew up a 326 and paid for a 389 install...coulda happened. The way you got the 389 engine in the Lemans was to check off the "GTO" option,,,,it cost a whopping $300, but for that you got a 389, GTO suspension, cooling, etc. etc. I think that's how most people got a 389 in an A body back then! What probably happened to yours : it's the late '70's or early '80's, and Junior has inferited the faithful family Lemans. Doing burnouts in the high school parking lot, he craters the 326. Off to the junkyard, and $100 later, he has a genuine, running, boneyard 389 between his frame rails.
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post #5 of 19 (permalink) Old 05-24-2009, 06:27 PM
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Ya gotta change the color of the motor if you want to sell the look.
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post #6 of 19 (permalink) Old 05-24-2009, 10:01 PM Thread Starter
 
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Tranny is painted the same color. Car needs a bunch of work, but I'm not scared. Wish it had AC and power brakes, give it time.
I had a 66 Tempest and a 71 Lemans with GTO front clip and 3.55posi rear end back in the 80s in high school. I was the kid doing the burnouts in the high school parking lot, thanks to a 455 w/3.55 posi, and grenaded the motor racing, spun a bearing. Then joined the AF, went to England, and mom sold the car off for $200. That was 84, and my car didn't have a trunk or rear quarters-Wisconsin rust. I guess this 66 is pretty clean in retrospect.
I have the 70 Lemans Sport, now I'm getting the 66, so I am like a kid in a candy store.
It makes sense about the 389 not coming in Lemans, same thing as a SS396 Chevelle, if you want the 396, you have to get the SS. Now, I have to check the engine code to see what it is as there were YE motors for a few years.
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post #7 of 19 (permalink) Old 05-25-2009, 01:18 AM
 
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There's a cool website called wallaceracing.com. There is tons of info on the engine codes in there. Some of the "Big Car" 389s came with better heads than the GTO 389s. They had the same compression, but larger exhaust valves. They came with smaller cams, which is why they're less hp (and the 2bbl).
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post #8 of 19 (permalink) Old 05-26-2009, 03:32 PM
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Nice looking toy to play with. Send for the PHS docs and you'll know exactly how it was originally built.

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post #9 of 19 (permalink) Old 05-27-2009, 10:24 PM Thread Starter
 
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PHS docs would be good. I assume the owner had the Lemans in good shape and a wrecked 66 GTO or big car, and swapped all the parts over exept the trans. I got the original chrome valve covers and vented air cleaner, all need rechrome.
It has a weird electric actuator mounted in line with the accelerator pedal linkage, linkage could hit it at WOT, what is this switch? Now, with the Edelbrock carb on it, linkage doesn't get anywhere near it, but it's still wired.
It is a YE block and 092 heads, so should be 389/325HP. Carb had the wrong base plate gasket on it for a stock carter 4 barrel manifold, open square port instead of 4 hole gasket, so had massive vac leaks, bad idle when I got it. Rebuilt the carb, new gasket, runs/idles great!!! Ordered an HEI and wires for it, get rid of the points and vac can is shot. Get my full timing with the HEI. Oh, 70 and 66 Points dist F/S, make offer...
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post #10 of 19 (permalink) Old 05-28-2009, 12:19 PM
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The switch at the gas peddel is for the kick-down switch on the tranny. I would adjust the linkage or the switch so it is detented when at WOT.
Nice ride, but like mentioned, you need to change the motor color.
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