PO 1 vs PO 2

[Dale C.]

Here is a good picture comparing the PO1 and PO2 showing the fin termination at the hub and the lip of the PO1, note the valve stem fin. The part #'s are different. See my old PO 1 post July 31 2009 Jack Corso for the part numbers for the different fins. PO1 on right.
Dale

[John C.]

Re: PO 1 vs PO 2

Dale

I question if the fin change was the cause of the option code designation to change from PO1 to PO2. From what I have seen the fins changed sometime during the 68 model year but option code did not. My April built 68 has with the what you are calling the PO2 style fins. They are listed on the tank sheet as PO1. I have no doubt they are original to the car. So do I have PO1 or PO2?

John

[Jack C.]

Re: PO 1 vs PO 2

My January built 68 has P01 on the tank sticker, however, I have the later design P02 wheel cover.

[Paul O.]

Re: PO 1 vs PO 2

Just a question for Jack and John are you two the original owners of the the 2 68's? If you are not then it would be hard to say with a 100% accuracy that the PO2's were delivered new with the cars.

Last year I looked at a very nice 2 owner 69. The 69 was a very low serial number 200 something and low miles. The car had some unusual items on it 68 front grills, black screws on the center instrument bezel going to the driver and pass dash pads. But the very unusual item was PO2 drivers side and PO1 Pass side. It could have been original or the original owner lost 2 PO2 and ordered replacements and received PO1 over the counter or the other way around. All 4 covers looked to be the same age.

It is just very hard to verify that the cars we have today are the way they were delivered.. Just food for thought. Paul 18046

[Dale C.]

Re: PO 1 vs PO 2

John
I don't know what he heck went on back then. I guess all we will ever know for sure is that if the covers were on a 68 its a PO1 and if there are moved over to a 69 they were a PO2. Internal to GM logistics sometime during 68 it looks like they changed the fins and left the RPO alone till 69. Just a note both covers had same P/N ,1232117, inside.
Maybe
Dale

[Jack C.]

Re: PO 1 vs PO 2

Paul, I'm not the original owner, however, if I were to bet, I will say, mine are the original covers.

[Terry B.]

Re: PO 1 vs PO 2

Dale,

Thanks for the picture. Is the picture from your hubcaps? I have never seen this termination of the fins in a 15 inch rim, only 14 inch, but I have been looking a long time to find one that terminates that way. I've only heard about it from others, such as Paul, that PO-1's had this type of fin termination. I thought it was something like the city of Atlantis. The hubcap on the right is for a 15 inch rim, right? I just want to be sure that I have finally seen my first PO-1. Thanks again.

[Sal C.]

Re: PO 1 vs PO 2

John
I don't know what he heck went on back then. I guess all we will ever know for sure is that if the covers were on a 68 its a PO1 and if there are moved over to a 69 they were a PO2. Internal to GM logistics sometime during 68 it looks like they changed the fins and left the RPO alone till 69. Just a note both covers had same P/N ,1232117, inside.
Maybe
Dale

Dale, Just to add to you're note....although the number 1232117 is inside both style fins, the later (squared off) fins also have the number 1376022 added to them. Neither of those are part numbers. They are casting numbers. The only NOS fins I have ever found were just like that and carried GM part number 3980984 on the label.

[Sal C.]

Re: PO 1 vs PO 2

Early on right, later on left. Also notice differance in hub emblem mounting area.

[Paul O.]

Re: PO 1 vs PO 2

Sal is the dimension across the hub area for the center emblem different from the PO1 to the PO2 or is it the same. Paul 18046

[Sal C.]

Re: PO 1 vs PO 2

Yes, PO1 is wider.

[John C.]

Re: PO 1 vs PO 2

Paul

I'm the second owner so I can't be 100% sure, 95% yes. I've looked at a lot more then just my car before I came to that conculsion.

I just don't want people to believe that the fin design is what determined PO1 vs PO2, because I belive it does not. I think all we can say is there are two fin designs for the PO1 and maybe PO2 wheels. Exact usage yet to be determined.

John

[Dale C.]

Re: PO 1 vs PO 2

Like Sal's pictures my fins are different under the caps. The fins are the same cast no as you said but still diferent. I'll take the hubs off to show them. PO1 left, & PO1 is wider under the hub.
Dale