1972 Base Engine Alternator Pulley - What's Right?

[James B.]

Re: 1972 Base Engine Alternator Pulley - What's Right?

Thomas,

Thanks for posting the 72 LS5 alternator images. Nice!

Jim

[Don L.]

Re: 1972 Base Engine Alternator Pulley - What's Right?

1972 Base Engine AC #703 August 1972. (4 star working on 5) This car was used as a reference for latest 70-72 Judging Manual. "The manual that set the standard for others to be measured by" Led by Gary Bosselman

Thomas,
I'm quite interested in your photo of AC#703. When you say "AC", should I understand that to mean that car #703 is air conditioned? Car #703 is VERY close to my car's VIN. If air conditioned, I believe that car would have a different alternator than a non- AC car. AC cars had higher amp alternator. Recalling how the alternator came to St. Louis with the pulley installed, could the stamped pulley be connected to the AC alternator?

[Joe L.]

Re: 1972 Base Engine Alternator Pulley - What's Right?

Thomas,
I'm quite interested in your photo of AC#703. When you say "AC", should I understand that to mean that car #703 is air conditioned? Car #703 is VERY close to my car's VIN. If air conditioned, I believe that car would have a different alternator than a non- AC car. AC cars had higher amp alternator. Recalling how the alternator came to St. Louis with the pulley installed, could the stamped pulley be connected to the AC alternator?

Don------


For 1972 AC-equipped small blocks used a pulley unique to that application. The pulley should have a "6" stamped on the face.

[Thomas B.]

Re: 1972 Base Engine Alternator Pulley - What's Right?

Yes ac

AC meaning air conditioned car. We call em a slush box down south. AC PW PB PS ETC... My mistake, certainly #703 is and early Aug. 71 vin, If we need full belt configuration, I will be happy
to oblige. I did my share of destroying old vettes in the name of restoration over the decades and anything I can do to save a real one I will.

[Terry M.]

Re: 1972 Base Engine Alternator Pulley - What's Right?

Yes ac

AC meaning air conditioned car. We call em a slush box down south. AC PW PB PS ETC... My mistake, certainly #703 is and early Aug. 71 vin, If we need full belt configuration, I will be happy
to oblige. I did my share of destroying old vettes in the name of restoration over the decades and anything I can do to save a real one I will.

Atoning for past sins, eh Tom? You know everyone loves someone seeking redemption. It is what this country is built on.

[Joe L.]

Re: 1972 Base Engine Alternator Pulley - What's Right?

Tom,

I suspect you mean that it's an August of 71 car.

Sept 71 car
Nov 71 car

both have the machined pulleys on 950 alternators.

I didn't get to the 71 last evening, hope to on Saturday.

Patrick------


Did you ever get to your 1971? If it has a stamped steel pulley, I'm interested to know what the single digit stamped on the front is.

[Patrick H.]

Re: 1972 Base Engine Alternator Pulley - What's Right?

Patrick------


Did you ever get to your 1971? If it has a stamped steel pulley, I'm interested to know what the single digit stamped on the front is.

No, but odds are I will soon.
If the asphalt goes on our driveway Wednesday like it's supposed to, then I will start to move cars into the new barn from Dad's place after Bloomington. As such, I'll be looking at it sometime in the next couple of weeks.

PH

[Don L.]

Re: 1972 Base Engine Alternator Pulley - What's Right?

Has anyone seen a stamped pulley on a 1100950 (1971/2 base 350ci & LT1) alternator? So far, I've looked at a half dozen or so known original cars and they all have the 950 alternator with the machined pulley. I've seen a couple '69s and one '70 small block. They have the 2 piece stamped pulley. I just bought a machined pulley off a 950 alternator.

I plan to look at all the cars I can in Bloomington next week to see what I can find/learn there.

[Joe L.]

Re: 1972 Base Engine Alternator Pulley - What's Right?

Has anyone seen a stamped pulley on a 1100950 (1971/2 base 350ci & LT1) alternator? So far, I've looked at a half dozen or so known original cars and they all have the 950 alternator with the machined pulley. I've seen a couple '69s and one '70 small block. They have the 2 piece stamped pulley. I just bought a machined pulley off a 950 alternator.

I plan to look at all the cars I can in Bloomington next week to see what I can find/learn there.

Don------


If you come across any 1971-72 small blocks with a stamped steel pulley, please note and report what the stamped number is on the front of the pulley. This will be a very small font size. The number should be either a "5", "6", or "7". Also note whether the car has A/C, or not. I don't think that any 71-72 ever used a pulley with an integral fan so if you find any of those, I don't think it's original.