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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Dec 2007 Posts: 45 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2007 Posts: 45 | I'm looking to replace a generator with an alternator on my '49. We have a new 261 going in. If I visit the local junkyard, which alternator am I looking for that will be internally regulated and will fit the aftermarket alternator brackets? | | | | | Joined: Aug 2005 Posts: 6,377 Ex Hall Monitor | | Ex Hall Monitor Joined: Aug 2005 Posts: 6,377 | Are you converting to 12 volts? You can buy 6v internally regulated alternators on ebay and other places on line. I put one from these guys on my 38.
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Name your dog Naked so you can walk Naked in the park.
| | | | | Joined: Jul 2005 Posts: 2,031 Shop Shark | | Shop Shark Joined: Jul 2005 Posts: 2,031 | you'll need to figure out what it is you need from your truck, what electrics will you need to power &/or any future additions. but for most of us the 10 or 12 should work out just fine. you may have to make a plate to bolt your alt to @ the block to line-up the belt. i used a GM 10si - 12 volt 12 volt systems:::: also avail 12si, 12 ci http://www.rowand.net/Shop/Tech/GmAlternatorIdentification.htmthere are one wire and three wire hook-ups. my .02 is for the three wire  http://www.madelectrical.com/electricaltech/remotevoltagesensing.shtmlhttp://www.6066gmcguy.org/charging.htmsome good info here...
Last edited by carolines truck; 05/16/2008 5:59 AM.
Jim & Caroline
The highway is for gamblers, better use your good sense."
Gooday-that's my 1¢ answer due to the lousy economy ~ cause I ain't got - no . mo . doe
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| | | | | Joined: Dec 2007 Posts: 45 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2007 Posts: 45 | I'm switching to 12 volts.
The article in that link is excellent! I now feel like an alternator expert and I'm off to go alternator hunting.
Thanks much.
Jim
Last edited by Jim A; 05/05/2008 5:51 PM.
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