1972 Base Engine Alternator Pulley - What's Right?

[Don L.]

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

Thanks for jumping in Gary.

Firstly, I want to share how much I appreciate all that worked to put the '70-'72 judging guide together. I am learning every day too and it looks like there's something to be learned on this issue. My research so far is showing almost all of these pulleys to be machined, not stamped.

As for your comment about the possibility that stamped pulleys might have been for one engine dress/configuration and the machined part for other set ups, how would we then explain this when knowing alternator assemblies were shipped into St. Louis with the pulleys installed? Could it instead be that there were multiple pulley suppliers and that's how we ended up with a mix of stamped and machined parts?

[Gary B.]

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

It could very well be a mix of stamped vs machined pulleys. Probably is. Or, did earlier cars, 70-71, have stamped pulleys and as it progressed into later 71 and 72 they were machined.

Fig. 12.4 is of a 71 LT1, not a base motor. So, it's no help...

I have a very late 68 here right now, base motor, with a stamped pulley. I'll get a picture in the morning.

As we were working on the 70-72 manual, I always kidded around about how rare base motor cars are. Just not enough around it seems like. Patrick has the worlds largest collection of base motor cars, or we at least kid him about it. We could always find LT1s, LS6s, big blocks, but not base motors to get pictures of. Rare cars. Very rare cars indeed.

Gary B

Maybe more base motor owners will answer up and we will see a trend. In the mean time, lets keep our eyes open.

Gary B

[Patrick H.]

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

I'll be at the cars on Saturday, possibly even as early as tomorrow evening.
I will look at the cars in person and report back.
In addition, I'll have Tom check the green car.

My memory says my late 71 has a stamped steel pulley, but I'll check.

Patrick

72basemotorking

[Joe L.]

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

It could very well be a mix of stamped vs machined pulleys. Probably is. Or, did earlier cars, 70-71, have stamped pulleys and as it progressed into later 71 and 72 they were machined.

Fig. 12.4 is of a 71 LT1, not a base motor. So, it's no help...

I have a very late 68 here right now, base motor, with a stamped pulley. I'll get a picture in the morning.

As we were working on the 70-72 manual, I always kidded around about how rare base motor cars are. Just not enough around it seems like. Patrick has the worlds largest collection of base motor cars, or we at least kid him about it. We could always find LT1s, LS6s, big blocks, but not base motors to get pictures of. Rare cars. Very rare cars indeed.

Gary B

Maybe more base motor owners will answer up and we will see a trend. In the mean time, lets keep our eyes open.

Gary B

Gary-------


1968-70 with base engine will have a stamped steel pulley if original. 1971+ is a different situation, though.

[Joe L.]

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

I'll be at the cars on Saturday, possibly even as early as tomorrow evening.
I will look at the cars in person and report back.
In addition, I'll have Tom check the green car.

My memory says my late 71 has a stamped steel pulley, but I'll check.

Patrick

72basemotorking

Patrick------


If it does have a stamped steel pulley, I'll be VERY interested to learn what digit is stamped into the pulley. It will be quite small and you may need a magnifying glass to accurately read it.

[Gary B.]

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

Attached is a stamped pulley from a very late 1968 base motor. No power steering, pretty base car.

I'll look through my pictures today from when I did the 70-72 update and see what else I can find.

Gary B

[Thomas B.]

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

This seems to be quite an interesting discussion. Later today I will upload images of the Bowtie here (Base e/q air). fyi... registered for display at Altoona

If necessary 8K mile 72 LS5 e/q air.

[James B.]

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

This seems to be quite an interesting discussion. Later today I will upload images of the Bowtie here (Base e/q air). fyi... registered for display at Altoona

If necessary 8K mile 72 LS5 e/q air.

Thomas,

I for one, would definitely be interested in seeing images of the 72 LS5!

Jim

[Thomas B.]

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 B.]

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

December 1972 8K mile 5 star LS5 AC Used as reference car for revision of latest Judging Manual Led by Gary Bosselman...."The manual that set the standard by which others are measured"

[Joe L.]

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

I wonder if power steering versus non-power has an effect on pulley?



Gary Bosselman

Gary-------


Power steering versus non-power steering has no effect on any pulley used for 71-72 small blocks.

[Joe L.]

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

December 1972 8K mile 5 star LS5 AC Used as reference car for revision of latest Judging Manual Led by Gary Bosselman...."The manual that set the standard by which others are measured"

Thomas------


Based on the alternator pulley, this is a big block with power steering. For big blocks, the alternator pulley is different for power steering versus non power steering.

[Thomas B.]

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

Best shot I can get on front of LS5 pulleyYes Both cars are PS...Keep in mind No AIR Pump on Base engine

[Joe L.]

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

Best shot I can get on front of LS5 pulleyYes Both cars are PS...Keep in mind No AIR Pump on Base engine

Thomas------

This pulley is a GM #3883978.

[Patrick H.]

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

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.