Rear Brake Drum Dilemma

[roger55]

I have a '57 Chevy pickup and the rear housing it has came out of a '65 GMC pickup (with leaf springs).

I cannot find new brake drums for this. I've got the originals but they are worn out.

I just paid $900 to have this rear all rebuilt (with new gears, bearings and posi unit) so I need to somehow solve this issue.

Evidently, these drums are a fairly rare bird and only came on '65-'67 GMC rears with leaf springs and '66-'67 Chevy P10 step vans with leaf springs.

The only present part# that comes up for those is a Centric 122.66037 but the Centric warehouse has been out of stock on those for quite some time with no expected date. I've been searching for about 6 weeks now and only found one supplier with 1 in stock (for $194) but just 1 doesn't do me any good.

Btw, here's the specs on the Centric 122.66037:




This may be an option though. There is a brake drum available for a '74 Jeep Wagoneer that is similar. It's a Centric 122.63028

The height is very close and the bolt circle is the same but the hub circle and bolt holes are both too small. I would have to take them to a machine shop to have the hub hole opened up to 3.56" and the bolt holes enlarged to .58". It appears that they would probably work if I had that done. Probably cheaper even after the machine work since these drums cost $28.79 on Rock Auto. It appears if the 122.66037 ever do come back in stock, they will be over $100 a piece.

Here's the 122.66028:



Any advice or ideas would be appreciated.