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| | | Forums66 Topics128,012 Posts1,055,317 Members48,419 | | Most Online14,466 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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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Oct 2006 Posts: 84 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2006 Posts: 84 | I was just wondering if anyone could tell me how to find out what size alternator I have. This is a '66 with V8 and std trans. It has a deluxe heater package I believe. There is no ID on the alt. so I can't tell. I guess some parts you get require this info. Thanks a lot. sovagary
GS
| | | | | Joined: Nov 2002 Posts: 1,002 Shop Shark | | Shop Shark Joined: Nov 2002 Posts: 1,002 | Most alternators do have an id stamped in the metal. You may have to pull it and wire brush it off to find it. There should be a part no, voltage, and amperage.
Larry
I don't own a vehicle that isn't old enough to drink. | | | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Gary,
For some reason 37 amps comes to mind. Does a '66 still have a external regulator...this would be the device that actually controlled how much current the alternator was allowed to put out.
Stuart | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | It should be stamped on the front housing just below the ear for the adjuster bracket. It probably was 37 or 42 amps but most rebuilders build them up to 55 amps. An alternator will not put out more then it,s designed amps. regardless of what you throw at it or how fast you turn it. They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Oct 2006 Posts: 84 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2006 Posts: 84 | Thank you gentlemen. I have found the stamping. It is in fact a 37 amp.
GS
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