Distributor Cam Piece

[RPOZ11]

I've been kinda playing around with GM distributor cam pieces.
I have seen pieces with a 7 initial # followed by a degree #.
732 for example
32 = 32* (degrees)
532 for example
32 = 32* (degrees)
when we see a 7 or a 5 preceeding the numerical; what does the 7 & the 5 designate?

[L78 steve]

 The 32 cannot correlate to 32 degrees.  The most mechanical advance mechanisms I have seen provide 9 to 12 degrees at the distributor. 12 with the 532. This will read out to 24 degrees at the crank. But not 32 degrees. I dial in 12 degrees initial plus the 24 mechanical for 36 total.

[RPOZ11]

Thanx !

Is there a listing anywhere to determine each distributor cam piece?

I am not an expert on these; just trying to learn how to understand them and how to determine what each piece equals to.
 

[A Schab]

I've also noticed ccw on the same part and have been told that means counter clock wise.Pontiacs have cw stamped on them and rotate opposite of Chevy's.Does anybody know anything more about theese stamp marks?

[RPOZ11]

Im not a Pontiac guy,
BUT!
I do know a very succesful pontiac stock racer who may be able to help.
I just picked up a Pontiac housing; no use for it but something to compare with?


CCW may be correct.

I myself wish to further explore this.
The one I am currently dealing with "appears" to be a local rebuild unit.
This distributor is not the correct stamped housing to my vehicle.
I compared it to an unmolested original piece, having the same ID stamping, and have found some differences between the 2.

The cam piece is a CCW 730.
The original unmolested distributor has a CCW 522.
Secondly, I am seeing a shaft with a different top cam vs the original unit.
The counter weights, in relationship to this cam, doesnt seem to be matching what I see in the unmolested distributor.
Why is this?
Disclaimer : I admit I know nothing about these, so please be understanding to my desired learning curve!

Is there a website or a distinguished individual who is in the know on how to translate all of these?

[RPOZ11]

Here is 2 Pontiac Distributor Cam pieces that I have here.
Both show the CW.
Notice the advance window (is this the correct name for this area???)
The 7(22) has a smaller window vs. the 5(32)