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Alternator bracket, what do I need

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Old 05-23-2018, 12:20 PM
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emccomas
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Default Alternator bracket, what do I need

I am in the process of moving the alternator on my 64 from the pass side to the driver's side (in preparation for Vintage A/C).

I have the correct 1964 left hand exhaust manifold, and the correct (I think) lower alternator mount bracket.

I am looking for the correct upper mount bracket.

What is it? Part number, picture, measurements would all be good.

It almost looks like it would need to be something a bit unusual shaped to clear the upper radiator hose.

Last edited by emccomas; 05-23-2018 at 12:21 PM.
Old 05-23-2018, 12:29 PM
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Nowhere Man
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Why not buy the correct GM design brackets from Pragon or others for factory AC cars
Old 05-23-2018, 12:55 PM
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Originally Posted by Nowhere Man
Why not buy the correct GM design brackets from Pragon or others for factory AC cars
Happy to, tell me what it is. What is the part number?

Also, there appeasrs to be3 a difference between the 250/300hp with A/C and the 350/365 hp with A/C upper brackets? Any idea why.

Air cleaner snorkel clearance?

Last edited by emccomas; 05-23-2018 at 01:01 PM.
Old 05-23-2018, 01:21 PM
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Originally Posted by jv04
Happy to, tell me what it is. What is the part number?

Also, there appeasrs to be3 a difference between the 250/300hp with A/C and the 350/365 hp with A/C upper brackets? Any idea why.

Air cleaner snorkel clearance?
My guess would be the exhaust manifolds and how the lower mounting bracket is configured. I don’t have a AIM to look it up.
Old 05-23-2018, 01:48 PM
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Frankie the Fink
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You will also want the A/C upper radiator hose.
Old 05-23-2018, 04:00 PM
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just use 66-67 brackets.
Old 05-23-2018, 04:15 PM
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Originally Posted by Frankie the Fink
You will also want the A/C upper radiator hose.
Good point Frankie. I did not think about that.

I need to spend some time with the AIM this evening figuring out what parts get changed.
Old 05-23-2018, 04:30 PM
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Isn't the passenger car alternator and mounted bracket on the left side? I wonder if the mounting bracket would be the same as Corvette with A/C? I don't have a 64 pass car AIM.

Last edited by Critter1; 05-23-2018 at 04:31 PM.
Old 05-23-2018, 05:15 PM
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65 365 w/ac, brackets are the same as a 66-67, upper hose is different, but not much. had another 65 300hp w/ac, same brackets.
Old 05-23-2018, 05:46 PM
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Originally Posted by midyear


65 365 w/ac, brackets are the same as a 66-67, upper hose is different, but not much. had another 65 300hp w/ac, same brackets.
Upper brace for 64-65 with 250 and 300hp is part number 3854028.
Upper brace for 64-65 with 365 hp is part number 3946862.

They have distinctly different shapes. Not sure why yet.

Last edited by emccomas; 05-23-2018 at 05:47 PM.
Old 05-23-2018, 06:04 PM
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Originally Posted by jv04
Upper brace for 64-65 with 250 and 300hp is part number 3854028.
Upper brace for 64-65 with 365 hp is part number 3946862.

They have distinctly different shapes. Not sure why yet.

Your installing aftermarket AC, and want to move your alternator to the other side so you can install the compressor on the pass side correct?? shape of the upper brace is irrelevant as its not going to be original anyways. both will work, nobody is going to point out an alternator bracket doesn't look correct on a car with vintage AC. your overthinking this.
Old 05-23-2018, 06:05 PM
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Originally Posted by jv04
Upper brace for 64-65 with 250 and 300hp is part number 3854028.
Upper brace for 64-65 with 365 hp is part number 3946862.

They have distinctly different shapes. Not sure why yet.
I haven't looked up your numbers yet but I can tell you for sure that your 3946862 is not the original part number. It may be a substitute though. Could it be a 3846862?
Old 05-23-2018, 06:10 PM
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Originally Posted by jv04
Upper brace for 64-65 with 250 and 300hp is part number 3854028.
Upper brace for 64-65 with 365 hp is part number 3946862.

They have distinctly different shapes. Not sure why yet.
.

and...are you being this way with the compressor mounting brackets as well? or are you just going to be satisfied with the Alan Grove brackets they send you with the kit?? running a sanden or A6?
Old 05-23-2018, 06:39 PM
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Originally Posted by Critter1
I haven't looked up your numbers yet but I can tell you for sure that your 3946862 is not the original part number. It may be a substitute though. Could it be a 3846862?
Yep, typo. Thanks.
Old 05-23-2018, 06:42 PM
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Also occurred to me that the dual snorkel air cleaner is different between an A/C and a non A/C car.

I am not that hung up on originality, I just want it to look "correct".

I will do am much as I can with the brackets on the Vintage Air system as well.

No, it will not look totally original, but close.
Old 05-24-2018, 06:45 AM
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Originally Posted by jv04
Also occurred to me that the dual snorkel air cleaner is different between an A/C and a non A/C car.

I am not that hung up on originality, I just want it to look "correct".

I will do am much as I can with the brackets on the Vintage Air system as well.

No, it will not look totally original, but close.
Don't listen to the detractors...
The alternator mounting plates provided for my 63 Vintage Air plate looked like back yard Bubba stuff. Beefy plates, heavy looking and in-your-face.

I used all '63 A/C car mounting stuff from Long Island Corvettes....it worked well and that included the brackets, spacers and radiator hose (I don't remember the '63 snorkel air cleaner being different).... I upgraded the one-year-only alternator internally to 100 amps too. A much cleaner look.

As to the Sanden compressor ? It is what it is ? Won't ever look original but that's the price you pay.
Old 05-24-2018, 08:43 AM
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Originally Posted by Frankie the Fink
Don't listen to the detractors...
The alternator mounting plates provided for my 63 Vintage Air plate looked like back yard Bubba stuff. Beefy plates, heavy looking and in-your-face.

I used all '63 A/C car mounting stuff from Long Island Corvettes....it worked well and that included the brackets, spacers and radiator hose (I don't remember the '63 snorkel air cleaner being different).... I upgraded the one-year-only alternator internally to 100 amps too. A much cleaner look.

As to the Sanden compressor ? It is what it is ? Won't ever look original but that's the price you pay.
I will get as close as is reasonable, and you have done, and it will be fine.

It will look as if the factory installed the Sanden compressor, or as close as I can get. Thanks.

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Old 05-24-2018, 08:48 AM
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Originally Posted by midyear


65 365 w/ac, brackets are the same as a 66-67, upper hose is different, but not much. had another 65 300hp w/ac, same brackets.
Looking at your engine, I realize that my oil fill tube fits in the opposite direction from yours (mine is tilted toward the driver's side); my upper radiator hose is moved more towards the left side than yours; and my dual snorkel air cleaner tube is also going to cause some issues.

I am working on an adapter so I can use the 365 hp air cleaner base on my 300 hp carb, at least for tie time being.
Old 05-24-2018, 02:29 PM
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Originally Posted by jv04
Looking at your engine, I realize that my oil fill tube fits in the opposite direction from yours (mine is tilted toward the driver's side); my upper radiator hose is moved more towards the left side than yours; and my dual snorkel air cleaner tube is also going to cause some issues.

I am working on an adapter so I can use the 365 hp air cleaner base on my 300 hp carb, at least for tie time being.

Here is a pic of a 65 300hp AC car I built a few years back, probably more like your 64.





Old 05-24-2018, 03:31 PM
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Originally Posted by midyear
Here is a pic of a 65 300hp AC car I built a few years back, probably more like your 64.





The upper alternator brace on your 300 hp car looks a lot like the part called for on the 365 hp car, and it appears to have plenty of clearance. That upper brace is not hard to find. Thanks for the photos


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