I just ordered a pair yesterday from Dean at Datsunparts dot com. He is asking $130/each, or $230/pair. He just got his first shipment of 15 pairs. Datsunparts mostly caters to Datsun Roadsters, but he has other parts as well, and apparently specializes in remanufacturing NLA Datsun parts. I will let everyone know about look and fitment after I receive them. Here's the link to his website:

Datsunparts.com Partnumber 2550 Datsun Z Car 70 - 78 & 510 68 - 73 Rear Aluminun Finned Brake Drum

Be aware that he only takes orders by phone or e-mail, no shopping cart.

Are the aluminum drums that important to you? You can get iron drums very cheaply, and they are an improvement, although not aluminum.

Are the aluminum drums that important to you? You can get iron drums very cheaply, and they are an improvement, although not aluminum.

In what sense are iron drums an improvement over aluminum?

The alu inum drums are supposed to deform when braking, most likely in racing conditions.

Nope. We have had a set of them on our 240 race car for the past 10 yrs with no issues whatsoever.

BTW, I have 3 sets of new aluminum drums sitting on the shelf.

The alu inum drums are supposed to deform when braking, most likely in racing conditions.

Drum deformation under braking. Seriously? Where do you come up with this stuff?

FWIW, iron drums degrade performance in almost every sense: not only are they heavier but they're worse at dissipating heat than their aluminum counterparts.

Edited February 7, 201312 yr by LeonV

You should try reading the JTR book.

Books are nice. Actual race track experience is a tad better.

I'd prefer keeping my aluminum drums, but at some point tey are going to wear-out. Hopefully at that point they can still be resurfaced or re-lined.

There is one thing that might make the iron drums better - availability!

Books are nice. Actual race track experience is a tad better.

Just a tad...

I'd prefer keeping my aluminum drums, but at some point tey are going to wear-out. Hopefully at that point they can still be resurfaced or re-lined.

There is one thing that might make the iron drums better - availability!

I'll give you availability and price! Those are the only two upsides to the iron drums.

I raced with aluminum drum for 8 years with no deformation problem. I thought I was going to have to hit the track with steel drums until I saw these available.

The alu inum drums are supposed to deform when braking, most likely in racing conditions.

Absolutely not true... I will give you that the braking system was the most underdesigned system on the early cars but any problems with it manifested in fade at the front.