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Old 11-04-2008, 11:35 PM   #1
thesteppenwolf
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updating alternator, ext to int

Oks, I am sure this has been hashed out before, I just can't find it on this site is all. I have a '71 small block, 4 x 4 I am trying to get up and keep running. I am attempting to move the alternator to the left side, instead of making all the external regulator leads to the opposite side, I want to just change it over to an internal regulator style. I have been getting so much conflicting information. I know it can't be hard, I think I have it now, but for some reason the battery shows weak at times. I had the battery tested two different places, it shows good. I have attempted to make it a one wired set up....oks guys, let get me out of this situation...I would appreciate it....
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Old 11-05-2008, 01:45 AM   #2
lytemup454
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Re: updating alternator, ext to int

i had both my alt. and bat. checked twice and both checked out fine but the bat. kept dying on me while driving. Turns out ext alt. was puting out just enouf juice to pass but not enouf to compete with my small block. I went in and bought an internal alt. and haven't had to think about it since.
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Old 11-05-2008, 02:03 AM   #3
El Jay
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Re: updating alternator, ext to int

Quote:
Originally Posted by thesteppenwolf View Post
Oks, I am sure this has been hashed out before, I just can't find it on this site is all. I have a '71 small block, 4 x 4 I am trying to get up and keep running. I am attempting to move the alternator to the left side, instead of making all the external regulator leads to the opposite side, I want to just change it over to an internal regulator style. I have been getting so much conflicting information. I know it can't be hard, I think I have it now, but for some reason the battery shows weak at times. I had the battery tested two different places, it shows good. I have attempted to make it a one wired set up....oks guys, let get me out of this situation...I would appreciate it....
Hopefully, this will help a bit.
I did it; and the wiring part was about a 10 minute job after the alternator was installed.
You can get a replacement alternator plug at almost any auto supply for under $10 to sanitize the appearance.

http://67-72chevytrucks.com/vboard/s...d.php?t=119379
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Old 11-05-2008, 02:29 AM   #4
bad6772
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Re: updating alternator, ext to int

Have you though about a one wire..? You can pick up one from napa for around 70/80 bucks....The ones i got from both trucks are in 90 and 120 amp models......Saves the factory harness, And i have had no issues with mine.......
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Old 11-05-2008, 08:13 AM   #5
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Re: updating alternator, ext to int

Quote:
Originally Posted by thesteppenwolf View Post
Oks, I am sure this has been hashed out before, I just can't find it on this site is all. I have a '71 small block, 4 x 4 I am trying to get up and keep running. I am attempting to move the alternator to the left side, instead of making all the external regulator leads to the opposite side, I want to just change it over to an internal regulator style. I have been getting so much conflicting information. I know it can't be hard, I think I have it now, but for some reason the battery shows weak at times. I had the battery tested two different places, it shows good. I have attempted to make it a one wired set up....oks guys, let get me out of this situation...I would appreciate it....
The alternator is originally on the left side of our trucks. (drivers side/street side). But I think you are wanting to move it to the right side (passenger side/curb side) by your description of not wanting to move the regulator.

When I bought my truck the PO had moved it over to the right side. He just extended the wires and left the regulator mounted in its original place.
s/t
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Last edited by Sport/Truck; 11-05-2008 at 08:13 AM.
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Old 11-05-2008, 08:31 AM   #6
big_al_71
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Re: updating alternator, ext to int

I changed mine to a 120 one wire set up to the right side of the motor. No issues and very simple....bought the plug at advanced auto, ran two wires and done.
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Old 11-05-2008, 08:38 AM   #7
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Re: updating alternator, ext to int

http://67-72chevytrucks.com/vboard/s...d.php?t=119379
more good info here- http://www.alternatorparts.com/FAQ.htm
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Old 11-05-2008, 11:55 PM   #8
thesteppenwolf
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Re: updating alternator, ext to int

Thank gus, it all helps.on the single wire from the parts store, does that still let my cluster ampmeter fuction properly?..yeas, the orginal alternator was on the left, then put it on the right....also, I want to install a tach, mainly for other people who might drive the truck and not be aware if it is in Hi or Lo range, not too long ago my son was driving the truck and smoked the 350 I had in, went I dug into it found that it was in Lo range, I am sure he was running at highway speed in Lo...the 350 must of likes that 6,000r's for a few miles..in the regards to the the tach install, it has HEI update..thanks, I appreciate all of the help
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