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04-16-2024, 02:15 PM | #1 |
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1967 Chevy 327 Alternator Setup
Good morning everyone!
Does anyone have any pictures of the proper alternator setup for a 1967 Chevy 327 with no A/C or powersteering? My K20 had a motor from a 68 chevelle or other car at some point grafted into it. My water pump pulley (short pump) is a dual groove pulley that is not correct as far as I know. My 327 has no accessory holes in the heads and I am running what I think is the stock rams horns manifolds with the mounting bolt holes that face foward. The challenge that I have is that the alternator pulley doesn't seem to line up with the water pump and crank pulley. It is off by about 1/4 to 3/8 of an inch. Additionally, the upper brace doesn't have enough travel in it to properly adjust the belt tension. Also, the alternator only has a small amount it can move forward due to the valve cover. Can anyone shed some light on this? Thanks, Clay
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Clayton Sikes Peoria, Arizona 1967 Chevy K20 Build Thread: https://67-72chevytrucks.com/vboard/...d.php?t=841272 |
04-16-2024, 03:43 PM | #2 |
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Re: 1967 Chevy 327 Alternator Setup
Interesting. What you have in your photos looks just like the setup in my 67 with stock 283. I'd guess the setup would be the same since you have the short water pump. I can get some photos of mine if you would like.
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1967 C10 1980 Jeep CJ5 2020 Toyota 4Runner 2024 Toyota Tundra |
04-16-2024, 04:28 PM | #3 | |
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Re: 1967 Chevy 327 Alternator Setup
Quote:
Thanks, Clay
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Clayton Sikes Peoria, Arizona 1967 Chevy K20 Build Thread: https://67-72chevytrucks.com/vboard/...d.php?t=841272 |
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04-16-2024, 04:28 PM | #4 |
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Re: 1967 Chevy 327 Alternator Setup
I don't know if this is helpful but I bought mine from Alan Grove.
https://alangrovecomponents.com/index.htm |
04-16-2024, 04:31 PM | #5 | |
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Re: 1967 Chevy 327 Alternator Setup
Quote:
These are interesting....If I can't figure out the alignment issue, then maybe this is the route to go. Thanks! Clay
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04-16-2024, 05:22 PM | #6 |
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Re: 1967 Chevy 327 Alternator Setup
As far as the alternator belt issue, you could get a shorter belt or shorten the adjustment arm and re drill it.
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04-16-2024, 05:25 PM | #7 | |
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Re: 1967 Chevy 327 Alternator Setup
Quote:
The problem is that I would actually need to lengthen the upper brace. I only have about 1" of travel between the alternator hitting the valve cover and the end of the groove in the brace where you put the bolt. It is almost as if the arm is too short for this setup. But I can't seem to find an arm with the same radius as this one but longer than 14" if that makes sense. Clay
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Clayton Sikes Peoria, Arizona 1967 Chevy K20 Build Thread: https://67-72chevytrucks.com/vboard/...d.php?t=841272 |
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04-16-2024, 05:44 PM | #8 |
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Re: 1967 Chevy 327 Alternator Setup
Here is the best photo I got from my setup, which I have to believe is stock as everything else under the hood was when I go the truck.
The lower bracket does connect to the water pump with a stud and my digital caliper showed 0.214" from water pump face to backside of bracket. The alternator belt looks like it is not running square but I think that is just an oddity of the angle of the photo. I've driven this truck over 3000 miles since getting it running with this setup. You will also notice my truck has power steering. That was a recent addition with and Alan Grove power steering pump bracket and add on crank pulley. I'd recommend Alan Grove as everything fit like a champ. If you need more measurements, let me know.
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04-16-2024, 05:49 PM | #9 | |
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Re: 1967 Chevy 327 Alternator Setup
Quote:
Thank you much!!! This helps a ton! I also found a water pump stud in my spare parts can....I don't know where it came from but it measures what you have verified. If you don't mind, can you tell me if there is any kind of washer or spacer or anything that sits in between the bracket that bolts to the manifold and the alternator itself? This is on the lower alternator mount where it bolts into the boss that is part of the casting on the manifold. I think that the alternator just goes in between the bracket and the cast iron of the manifold boss, but wanted to verify. Thanks, Clay
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04-16-2024, 05:53 PM | #10 |
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Re: 1967 Chevy 327 Alternator Setup
For clarity, here is what I am referring to. I put a few washers in there to shim it back and forth as I play around with the bottom mounting, but it does not seem right to me.
Clay
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04-16-2024, 05:53 PM | #11 |
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Re: 1967 Chevy 327 Alternator Setup
You are correct on the mounting to the manifold. No extra spacers, directly bolted to the manifold. You can see the bottom bolt in the photo. The upper goes through the alternator into the upper threads on the manifold.
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04-16-2024, 05:58 PM | #12 | |
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Re: 1967 Chevy 327 Alternator Setup
Quote:
Thanks, Clay
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Clayton Sikes Peoria, Arizona 1967 Chevy K20 Build Thread: https://67-72chevytrucks.com/vboard/...d.php?t=841272 |
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04-16-2024, 06:30 PM | #13 |
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Re: 1967 Chevy 327 Alternator Setup
I have the same setup with AC and PS. A lot of folks with neither seem to mount the alt on the right side instead, so if you have to fab/order a bracket anyway, maybe look at that option
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04-16-2024, 06:33 PM | #14 | |
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Re: 1967 Chevy 327 Alternator Setup
Quote:
Clay
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Clayton Sikes Peoria, Arizona 1967 Chevy K20 Build Thread: https://67-72chevytrucks.com/vboard/...d.php?t=841272 |
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04-16-2024, 06:46 PM | #15 |
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Re: 1967 Chevy 327 Alternator Setup
One thing for sure, getting it sorted with the front clip off is the way to go. You can get up close with ease.
I’d bet a new lower bracket will solve some issues. I can measure the length of my upper bracket if you think that would help.
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04-16-2024, 06:49 PM | #16 | |
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Re: 1967 Chevy 327 Alternator Setup
Quote:
Clay
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04-16-2024, 06:49 PM | #17 |
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Re: 1967 Chevy 327 Alternator Setup
What type of alternator is it, or can you show a picture of the back of the alternator?
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04-16-2024, 06:52 PM | #18 | |
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Re: 1967 Chevy 327 Alternator Setup
Quote:
Clay
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Clayton Sikes Peoria, Arizona 1967 Chevy K20 Build Thread: https://67-72chevytrucks.com/vboard/...d.php?t=841272 |
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04-16-2024, 07:03 PM | #19 |
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Re: 1967 Chevy 327 Alternator Setup
OK regarding "upper brace doesn't have enough travel in it to properly adjust the belt tension," that is a 10DN alternator clocked to 12:00. When they are clocked to 3:00 as in the factory setup, it will get quite a bit closer to the valve cover. That is what that huge indentation in the side of it is for, allowing it to hug the valve cover. Example of 3:00.
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04-16-2024, 07:08 PM | #20 | |
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Re: 1967 Chevy 327 Alternator Setup
Quote:
THANK YOU!!!!!! Now it makes sense! I couldn't for the life of me understand how this was so close. The original valve covers were smashed in when I got the truck, so I just figured that someone put an aftermarket brace on it and beat the hell out of the valve cover. I am going to get an internally regulated alternator as an upgrade. I am assuming that I can just unbolt the alternator housing and clock it properly?? Clay
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04-16-2024, 07:12 PM | #21 |
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Re: 1967 Chevy 327 Alternator Setup
Yes, I think so but I haven't done one. Clocking will be useful just for the external regulated alternator. When switching to the internal regulator type such as 12SI, it doesn't have the indentation and clocking won't matter, and you'll be back to having just a short adjustment span.
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04-16-2024, 07:14 PM | #22 | |
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Re: 1967 Chevy 327 Alternator Setup
Quote:
Ok, that makes sense. I will likely stay with the externally regulated one for now. I found a video on YouTube that shows how to clock it. I will try it and then report back. Clay
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04-16-2024, 07:22 PM | #23 |
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Re: 1967 Chevy 327 Alternator Setup
I apologize for the thought about shortening the upper adjustment arm. Not thinking correctly.
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04-16-2024, 07:50 PM | #24 | |
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Re: 1967 Chevy 327 Alternator Setup
Quote:
I was willing to try anything to see if it would work. :-) Clay
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04-19-2024, 01:12 AM | #25 |
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Re: 1967 Chevy 327 Alternator Setup
I don't have a '67 or a 327, but I do have a different type of Alternator bracket on my '71 GMC Jimmy with a 350 and SM465 4-speed...
Also, I upgraded to the 12SI internally-regulated Alternator when the O'Reilly warranty part EVRs kept being dud after dud. Short water pump. Semper Fi.
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