Question on rear drums for a m1009

[lostintexas]

I purchased a set of rear drum that said they were for a M1009. The were NOS but now I'm wondering if they are actually the correct drums. The only markings I can find are the numbers:
GM 14072937

and then on the other side:
Max Diameter 11.24

Then the numbers W-10

I've search around and cannot find the GM part number as a cross reference for the M1009.

Any ideas?

As always thanks in advance.

 

[doghead]

The GM part number should be listed in the -20 or -34 parts tm.

 

[doghead]

From the -20P, 14070352 is the rear drum part number.

 

[lostintexas]

Thanks Doghead it was late and sorry for not being clear. What I couldn't find was the "GM 14072937" which is clearly stamped onto the drums I was sent. I know the part numbers change for some small design change but I could find zero reference to 14072937 part.

Sound like I should ask for a refund and get the 14070352 to be 100% sure.