Alternator pulley
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
My first thought - Serpentine, serpentine!
!
And on second thought, if you figure out how to have two sets of dual belts please let me know. Big Blue could use them as he has the one set of dual belts running the water pump and power steering pump as yours, and needs his 1G replaced by a 3G.
And on second thought, if you figure out how to have two sets of dual belts please let me know. Big Blue could use them as he has the one set of dual belts running the water pump and power steering pump as yours, and needs his 1G replaced by a 3G.
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Make sure both sheaves are the size you need. All of the ones I found used different sized belts.
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pedant
Joined: Jan 2008
Posts: 23,576
Likes: 39
From: EXTREME southwest CT
Going serpentine could be a challenge as fuel injected 460's (with the serpentine belt) have different head and waterpump bosses.
I use one belt and the L&L alternator bracket with my 3G.
My truck doesn't have a bunch of high current accessories.
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Todd - It doesn't say what belt size each sheave takes. Hopefully they are the same and the size you need.
Jim - Big Blue had a 1-wire Chevy alternator. It died and Powermaster said "We don't sell parts - ship it in and we will rebuild it." So, having a 1G on the shelf and seeing a regulator and familiar wiring on the fender, I bolted it in and hooked it up. Works perfectly and it can be replaced at about any parts store known to man. However, when I install a winch and a second battery it won't even come close to providing enough power, so a 3G conversion will happen some day.
Jim - Big Blue had a 1-wire Chevy alternator. It died and Powermaster said "We don't sell parts - ship it in and we will rebuild it." So, having a 1G on the shelf and seeing a regulator and familiar wiring on the fender, I bolted it in and hooked it up. Works perfectly and it can be replaced at about any parts store known to man. However, when I install a winch and a second battery it won't even come close to providing enough power, so a 3G conversion will happen some day.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 39
From: EXTREME southwest CT
Hey, that's great! 
Do you have a pic of your completed installation?
What belts did you end up using?
Do you have a pic of your completed installation?
What belts did you end up using?
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Junior User
Joined: Feb 2017
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i was just trying to get close to stock as possible and honestly at the time I didn't know much about these engines. The alternator was the first thing I replaced
FTE Legend
Joined: Nov 2015
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From: Angier, NC
Ok got it.
I think someone put a different ALT on that had that pulley or the stock pulley had a smaller ? dia outer pulley to drive the air pump that should be mounted above the ALT.
My truck has been so jacked up by other people I cant tell what it should have stock or not. Different year (car?) motor and the ALT pulley is only for 1 belt. Don't have an air pump so I am good with what it has.
I do plan on a 3G swap when I need to put the ALT back on the motor as the truck is going thru a rebuild.
Dave ----
I think someone put a different ALT on that had that pulley or the stock pulley had a smaller ? dia outer pulley to drive the air pump that should be mounted above the ALT.
My truck has been so jacked up by other people I cant tell what it should have stock or not. Different year (car?) motor and the ALT pulley is only for 1 belt. Don't have an air pump so I am good with what it has.
I do plan on a 3G swap when I need to put the ALT back on the motor as the truck is going thru a rebuild.
Dave ----
Thread Starter
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Junior User
Joined: Feb 2017
Posts: 84
Likes: 0
Ok got it.
I think someone put a different ALT on that had that pulley or the stock pulley had a smaller ? dia outer pulley to drive the air pump that should be mounted above the ALT.
My truck has been so jacked up by other people I cant tell what it should have stock or not. Different year (car?) motor and the ALT pulley is only for 1 belt. Don't have an air pump so I am good with what it has.
I do plan on a 3G swap when I need to put the ALT back on the motor as the truck is going thru a rebuild.
Dave ----
I think someone put a different ALT on that had that pulley or the stock pulley had a smaller ? dia outer pulley to drive the air pump that should be mounted above the ALT.
My truck has been so jacked up by other people I cant tell what it should have stock or not. Different year (car?) motor and the ALT pulley is only for 1 belt. Don't have an air pump so I am good with what it has.
I do plan on a 3G swap when I need to put the ALT back on the motor as the truck is going thru a rebuild.
Dave ----