factory alternator pully for 72 307
 

restoring my 1972 chevy c 10's engine compartment and I noticed that my lower alternator bracket has some bogus spacers between the bracket and the head. actually they were nuts installed between the bracket and the head so that the alternator pully lined up. clearly this is wrong. but looking at some pictures of other engin compartments I see similar "accomodations". either spacers between the bracket and the head or some sort of spacer rig between the bracket and the alternator.

I have an alternator that has a single groove pully that is almost 3/8 inch thicker than every other one I've seen. the thicker portion is between the pulley groove and the alternator fan. Pictures to follow.

what everybody doing regarding this?

my engine compartment is to remain origional

anybody got pictures of thier al pulley?

Re: factory alternator pully for 72 307
 

sorry its a 72

Re: factory alternator pully for 73 307
 

Here is a picture but it is not a close up. Usually the pulley alignment problems are caused by mismatching drive or water pump pulleys. With the alternator being the easy fix it is shimmed to match as in your case. From your description, the correct pulley would make your problem worse.

Jim

Re: factory alternator pully for 73 307
 

I agree with Jim on this one. I had all kinds of issues with my alternator not lining up with my drive and waterpump pulleys. I tried all my fixes on the alternator. Then one day I got smart and purchased a set of pulleys off a known unmolested truck. All my problems went away.

Jump over to the parts board and look for a matching set of crank and wp pulleys and remove all washers, bolts, and shims from the alt. bracket and mount it to the head like it was intended.

Re: factory alternator pully for 73 307
 

to bad I cant import pictures. they were worth showing:whine

what the pictures would have shown is that one pulley is about 3/8th inch thicker than the other and larger in diameter as well. the thicker pulley places the belt in perfect alignment with my water pump and crqnk pulley. and no home spun spacers are needed.

a survey of local and internet vendors indicate they only sell the thinner pulley alternators

has any body run into this problem?

Re: factory alternator pully for 73 307
 

installed.

Re: factory alternator pully for 73 307
 

I replaced my original 350 motor with the plain jane GM crate motor.
The heads on it are about 1/4" shorter on the front then the original.
I had to put spacer blocks behind the alternator bracket and the head, which I detest doing, but have to in order for the pulleys to line up.

I think you have the pulley I need! Any idea where to get one?

Jim, I've always liked that blue/white color combo you have there, that is going to be one really nice truck when done. wow.

Re: factory alternator pully for 73 307
 

not sure if this helps